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Finding the Fourth Proportional to 495,318.87, 683,526.87 and 280,479.33

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Solution

The fourth proportional to 495,318.87, 683,526.87 and 280,479.33 is: 387,054.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    495,318.87 : 683,526.87 = 280,479.33 : x
  2. Step 2: Convert to fraction form
    495,318.87/683,526.87 = 280,479.33/x
  3. Step 3: Cross multiply
    495,318.87x = 683,526.87 × 280,479.33
  4. Step 4: Simplify right side
    495,318.87x = 191,715,158,534.60
  5. Step 5: Solve for x
    x = 191,715,158,534.60/495,318.87
  6. Step 6: Final answer
    x = 387,054.02

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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.