Home / 912,959.60-1,369,439.40-380,303.60

Finding the Fourth Proportional to 912,959.60, 1,369,439.40 and 380,303.60

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Solution

The fourth proportional to 912,959.60, 1,369,439.40 and 380,303.60 is: 570,455.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    912,959.60 : 1,369,439.40 = 380,303.60 : x
  2. Step 2: Convert to fraction form
    912,959.60/1,369,439.40 = 380,303.60/x
  3. Step 3: Cross multiply
    912,959.60x = 1,369,439.40 × 380,303.60
  4. Step 4: Simplify right side
    912,959.60x = 520,802,733,801.84
  5. Step 5: Solve for x
    x = 520,802,733,801.84/912,959.60
  6. Step 6: Final answer
    x = 570,455.40

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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.