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Finding the Fourth Proportional to 687,124.48, 948,016.96 and 396,697.92

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Solution

The fourth proportional to 687,124.48, 948,016.96 and 396,697.92 is: 547,319.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,124.48 : 948,016.96 = 396,697.92 : x
  2. Step 2: Convert to fraction form
    687,124.48/948,016.96 = 396,697.92/x
  3. Step 3: Cross multiply
    687,124.48x = 948,016.96 × 396,697.92
  4. Step 4: Simplify right side
    687,124.48x = 376,076,356,156.72
  5. Step 5: Solve for x
    x = 376,076,356,156.72/687,124.48
  6. Step 6: Final answer
    x = 547,319.11

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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.