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Finding the Fourth Proportional to 478,351, 660,124.38 and 263,490.40

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Solution

The fourth proportional to 478,351, 660,124.38 and 263,490.40 is: 363,616.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,351 : 660,124.38 = 263,490.40 : x
  2. Step 2: Convert to fraction form
    478,351/660,124.38 = 263,490.40/x
  3. Step 3: Cross multiply
    478,351x = 660,124.38 × 263,490.40
  4. Step 4: Simplify right side
    478,351x = 173,936,436,935.95
  5. Step 5: Solve for x
    x = 173,936,436,935.95/478,351
  6. Step 6: Final answer
    x = 363,616.75

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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.