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Finding the Fourth Proportional to 721,870.39, 993,898.57 and 635,768.47

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Solution

The fourth proportional to 721,870.39, 993,898.57 and 635,768.47 is: 875,350.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,870.39 : 993,898.57 = 635,768.47 : x
  2. Step 2: Convert to fraction form
    721,870.39/993,898.57 = 635,768.47/x
  3. Step 3: Cross multiply
    721,870.39x = 993,898.57 × 635,768.47
  4. Step 4: Simplify right side
    721,870.39x = 631,889,373,184.09
  5. Step 5: Solve for x
    x = 631,889,373,184.09/721,870.39
  6. Step 6: Final answer
    x = 875,350.18

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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.