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Finding the Fourth Proportional to 558,319.56, 770,555.70 and 316,689.72

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Solution

The fourth proportional to 558,319.56, 770,555.70 and 316,689.72 is: 437,074.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    558,319.56 : 770,555.70 = 316,689.72 : x
  2. Step 2: Convert to fraction form
    558,319.56/770,555.70 = 316,689.72/x
  3. Step 3: Cross multiply
    558,319.56x = 770,555.70 × 316,689.72
  4. Step 4: Simplify right side
    558,319.56x = 244,027,068,877.40
  5. Step 5: Solve for x
    x = 244,027,068,877.40/558,319.56
  6. Step 6: Final answer
    x = 437,074.19

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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.