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Finding the Fourth Proportional to 648,355.28, 894,781 and 361,918.40

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Solution

The fourth proportional to 648,355.28, 894,781 and 361,918.40 is: 499,475.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,355.28 : 894,781 = 361,918.40 : x
  2. Step 2: Convert to fraction form
    648,355.28/894,781 = 361,918.40/x
  3. Step 3: Cross multiply
    648,355.28x = 894,781 × 361,918.40
  4. Step 4: Simplify right side
    648,355.28x = 323,837,707,870.40
  5. Step 5: Solve for x
    x = 323,837,707,870.40/648,355.28
  6. Step 6: Final answer
    x = 499,475.70

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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.