Home / 866,372.40-1,298,683.80-393,397.20

Finding the Fourth Proportional to 866,372.40, 1,298,683.80 and 393,397.20

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Solution

The fourth proportional to 866,372.40, 1,298,683.80 and 393,397.20 is: 589,698.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    866,372.40 : 1,298,683.80 = 393,397.20 : x
  2. Step 2: Convert to fraction form
    866,372.40/1,298,683.80 = 393,397.20/x
  3. Step 3: Cross multiply
    866,372.40x = 1,298,683.80 × 393,397.20
  4. Step 4: Simplify right side
    866,372.40x = 510,898,570,605.36
  5. Step 5: Solve for x
    x = 510,898,570,605.36/866,372.40
  6. Step 6: Final answer
    x = 589,698.58

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.