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Finding the Fourth Proportional to 742,490.32, 1,024,640.04 and 402,958.96

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Solution

The fourth proportional to 742,490.32, 1,024,640.04 and 402,958.96 is: 556,085.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    742,490.32 : 1,024,640.04 = 402,958.96 : x
  2. Step 2: Convert to fraction form
    742,490.32/1,024,640.04 = 402,958.96/x
  3. Step 3: Cross multiply
    742,490.32x = 1,024,640.04 × 402,958.96
  4. Step 4: Simplify right side
    742,490.32x = 412,887,884,892.76
  5. Step 5: Solve for x
    x = 412,887,884,892.76/742,490.32
  6. Step 6: Final answer
    x = 556,085.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.