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Finding the Fourth Proportional to 400,719.40, 601,079.10 and 266,656.30

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Solution

The fourth proportional to 400,719.40, 601,079.10 and 266,656.30 is: 399,984.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,719.40 : 601,079.10 = 266,656.30 : x
  2. Step 2: Convert to fraction form
    400,719.40/601,079.10 = 266,656.30/x
  3. Step 3: Cross multiply
    400,719.40x = 601,079.10 × 266,656.30
  4. Step 4: Simplify right side
    400,719.40x = 160,281,528,813.33
  5. Step 5: Solve for x
    x = 160,281,528,813.33/400,719.40
  6. Step 6: Final answer
    x = 399,984.45

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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.