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Finding the Fourth Proportional to 558,685.70, 771,003.75 and 316,978.46

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Solution

The fourth proportional to 558,685.70, 771,003.75 and 316,978.46 is: 437,440.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    558,685.70 : 771,003.75 = 316,978.46 : x
  2. Step 2: Convert to fraction form
    558,685.70/771,003.75 = 316,978.46/x
  3. Step 3: Cross multiply
    558,685.70x = 771,003.75 × 316,978.46
  4. Step 4: Simplify right side
    558,685.70x = 244,391,581,329.23
  5. Step 5: Solve for x
    x = 244,391,581,329.23/558,685.70
  6. Step 6: Final answer
    x = 437,440.19

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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.