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Finding the Fourth Proportional to 659,871.04, 910,639.68 and 358,065.28

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Solution

The fourth proportional to 659,871.04, 910,639.68 and 358,065.28 is: 494,139.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,871.04 : 910,639.68 = 358,065.28 : x
  2. Step 2: Convert to fraction form
    659,871.04/910,639.68 = 358,065.28/x
  3. Step 3: Cross multiply
    659,871.04x = 910,639.68 × 358,065.28
  4. Step 4: Simplify right side
    659,871.04x = 326,068,451,998.31
  5. Step 5: Solve for x
    x = 326,068,451,998.31/659,871.04
  6. Step 6: Final answer
    x = 494,139.66

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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.