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Finding the Fourth Proportional to 687,356.90, 948,969.79 and 534,105.60

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Solution

The fourth proportional to 687,356.90, 948,969.79 and 534,105.60 is: 737,389.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,356.90 : 948,969.79 = 534,105.60 : x
  2. Step 2: Convert to fraction form
    687,356.90/948,969.79 = 534,105.60/x
  3. Step 3: Cross multiply
    687,356.90x = 948,969.79 × 534,105.60
  4. Step 4: Simplify right side
    687,356.90x = 506,850,079,069.82
  5. Step 5: Solve for x
    x = 506,850,079,069.82/687,356.90
  6. Step 6: Final answer
    x = 737,389.97

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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.