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Finding the Fourth Proportional to 486,470.52, 671,661.18 and 316,999.80

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Solution

The fourth proportional to 486,470.52, 671,661.18 and 316,999.80 is: 437,675.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,470.52 : 671,661.18 = 316,999.80 : x
  2. Step 2: Convert to fraction form
    486,470.52/671,661.18 = 316,999.80/x
  3. Step 3: Cross multiply
    486,470.52x = 671,661.18 × 316,999.80
  4. Step 4: Simplify right side
    486,470.52x = 212,916,459,727.76
  5. Step 5: Solve for x
    x = 212,916,459,727.76/486,470.52
  6. Step 6: Final answer
    x = 437,675.98

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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.