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Finding the Fourth Proportional to 521,366.49, 719,465.79 and 291,902.31

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Solution

The fourth proportional to 521,366.49, 719,465.79 and 291,902.31 is: 402,814.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,366.49 : 719,465.79 = 291,902.31 : x
  2. Step 2: Convert to fraction form
    521,366.49/719,465.79 = 291,902.31/x
  3. Step 3: Cross multiply
    521,366.49x = 719,465.79 × 291,902.31
  4. Step 4: Simplify right side
    521,366.49x = 210,013,726,066.98
  5. Step 5: Solve for x
    x = 210,013,726,066.98/521,366.49
  6. Step 6: Final answer
    x = 402,814.01

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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.