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Finding the Fourth Proportional to 578,547.64, 868,381.17 and 279,238.92

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Solution

The fourth proportional to 578,547.64, 868,381.17 and 279,238.92 is: 419,128.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,547.64 : 868,381.17 = 279,238.92 : x
  2. Step 2: Convert to fraction form
    578,547.64/868,381.17 = 279,238.92/x
  3. Step 3: Cross multiply
    578,547.64x = 868,381.17 × 279,238.92
  4. Step 4: Simplify right side
    578,547.64x = 242,485,820,059.14
  5. Step 5: Solve for x
    x = 242,485,820,059.14/578,547.64
  6. Step 6: Final answer
    x = 419,128.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.