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Finding the Fourth Proportional to 653,711.86, 901,862.95 and 378,018.76

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Solution

The fourth proportional to 653,711.86, 901,862.95 and 378,018.76 is: 521,515.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    653,711.86 : 901,862.95 = 378,018.76 : x
  2. Step 2: Convert to fraction form
    653,711.86/901,862.95 = 378,018.76/x
  3. Step 3: Cross multiply
    653,711.86x = 901,862.95 × 378,018.76
  4. Step 4: Simplify right side
    653,711.86x = 340,921,114,048.94
  5. Step 5: Solve for x
    x = 340,921,114,048.94/653,711.86
  6. Step 6: Final answer
    x = 521,515.88

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Double scale
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Similar ratio
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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.