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Finding the Fourth Proportional to 687,553.20, 948,798.36 and 381,643.20

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Solution

The fourth proportional to 687,553.20, 948,798.36 and 381,643.20 is: 526,653.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,553.20 : 948,798.36 = 381,643.20 : x
  2. Step 2: Convert to fraction form
    687,553.20/948,798.36 = 381,643.20/x
  3. Step 3: Cross multiply
    687,553.20x = 948,798.36 × 381,643.20
  4. Step 4: Simplify right side
    687,553.20x = 362,102,442,265.15
  5. Step 5: Solve for x
    x = 362,102,442,265.15/687,553.20
  6. Step 6: Final answer
    x = 526,653.71

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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.