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Finding the Fourth Proportional to 638,138.70, 957,208.05 and 616,487.40

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Solution

The fourth proportional to 638,138.70, 957,208.05 and 616,487.40 is: 924,731.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,138.70 : 957,208.05 = 616,487.40 : x
  2. Step 2: Convert to fraction form
    638,138.70/957,208.05 = 616,487.40/x
  3. Step 3: Cross multiply
    638,138.70x = 957,208.05 × 616,487.40
  4. Step 4: Simplify right side
    638,138.70x = 590,106,702,003.57
  5. Step 5: Solve for x
    x = 590,106,702,003.57/638,138.70
  6. Step 6: Final answer
    x = 924,731.10

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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.