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Finding the Fourth Proportional to 486,473.64, 670,737.88 and 400,130.88

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Solution

The fourth proportional to 486,473.64, 670,737.88 and 400,130.88 is: 551,690.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,473.64 : 670,737.88 = 400,130.88 : x
  2. Step 2: Convert to fraction form
    486,473.64/670,737.88 = 400,130.88/x
  3. Step 3: Cross multiply
    486,473.64x = 670,737.88 × 400,130.88
  4. Step 4: Simplify right side
    486,473.64x = 268,382,938,173.73
  5. Step 5: Solve for x
    x = 268,382,938,173.73/486,473.64
  6. Step 6: Final answer
    x = 551,690.61

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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.