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Finding the Fourth Proportional to 717,307.20, 989,884.08 and 395,016.48

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Solution

The fourth proportional to 717,307.20, 989,884.08 and 395,016.48 is: 545,122.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,307.20 : 989,884.08 = 395,016.48 : x
  2. Step 2: Convert to fraction form
    717,307.20/989,884.08 = 395,016.48/x
  3. Step 3: Cross multiply
    717,307.20x = 989,884.08 × 395,016.48
  4. Step 4: Simplify right side
    717,307.20x = 391,020,524,889.64
  5. Step 5: Solve for x
    x = 391,020,524,889.64/717,307.20
  6. Step 6: Final answer
    x = 545,122.82

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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.