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Finding the Fourth Proportional to 558,197.72, 770,333.16 and 319,779.80

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Solution

The fourth proportional to 558,197.72, 770,333.16 and 319,779.80 is: 441,307.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    558,197.72 : 770,333.16 = 319,779.80 : x
  2. Step 2: Convert to fraction form
    558,197.72/770,333.16 = 319,779.80/x
  3. Step 3: Cross multiply
    558,197.72x = 770,333.16 × 319,779.80
  4. Step 4: Simplify right side
    558,197.72x = 246,336,983,838.17
  5. Step 5: Solve for x
    x = 246,336,983,838.17/558,197.72
  6. Step 6: Final answer
    x = 441,307.76

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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.