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Finding the Fourth Proportional to 478,561.10, 660,428.17 and 263,715.01

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Solution

The fourth proportional to 478,561.10, 660,428.17 and 263,715.01 is: 363,934.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,561.10 : 660,428.17 = 263,715.01 : x
  2. Step 2: Convert to fraction form
    478,561.10/660,428.17 = 263,715.01/x
  3. Step 3: Cross multiply
    478,561.10x = 660,428.17 × 263,715.01
  4. Step 4: Simplify right side
    478,561.10x = 174,164,819,145.47
  5. Step 5: Solve for x
    x = 174,164,819,145.47/478,561.10
  6. Step 6: Final answer
    x = 363,934.35

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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.