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Finding the Fourth Proportional to 714,148.20, 985,491.54 and 391,850.28

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Solution

The fourth proportional to 714,148.20, 985,491.54 and 391,850.28 is: 540,735.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,148.20 : 985,491.54 = 391,850.28 : x
  2. Step 2: Convert to fraction form
    714,148.20/985,491.54 = 391,850.28/x
  3. Step 3: Cross multiply
    714,148.20x = 985,491.54 × 391,850.28
  4. Step 4: Simplify right side
    714,148.20x = 386,165,135,886.63
  5. Step 5: Solve for x
    x = 386,165,135,886.63/714,148.20
  6. Step 6: Final answer
    x = 540,735.29

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Double scale
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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.