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Finding the Fourth Proportional to 717,308.70, 989,886.15 and 395,017.98

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Solution

The fourth proportional to 717,308.70, 989,886.15 and 395,017.98 is: 545,124.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,308.70 : 989,886.15 = 395,017.98 : x
  2. Step 2: Convert to fraction form
    717,308.70/989,886.15 = 395,017.98/x
  3. Step 3: Cross multiply
    717,308.70x = 989,886.15 × 395,017.98
  4. Step 4: Simplify right side
    717,308.70x = 391,022,827,402.98
  5. Step 5: Solve for x
    x = 391,022,827,402.98/717,308.70
  6. Step 6: Final answer
    x = 545,124.89

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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.