Home / 645,318.77-890,503.31-358,832.70

Finding the Fourth Proportional to 645,318.77, 890,503.31 and 358,832.70

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Solution

The fourth proportional to 645,318.77, 890,503.31 and 358,832.70 is: 495,168.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,318.77 : 890,503.31 = 358,832.70 : x
  2. Step 2: Convert to fraction form
    645,318.77/890,503.31 = 358,832.70/x
  3. Step 3: Cross multiply
    645,318.77x = 890,503.31 × 358,832.70
  4. Step 4: Simplify right side
    645,318.77x = 319,541,707,983.32
  5. Step 5: Solve for x
    x = 319,541,707,983.32/645,318.77
  6. Step 6: Final answer
    x = 495,168.78

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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.