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Finding the Fourth Proportional to 717,615, 1,070,800.38 and 642,216.96

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Solution

The fourth proportional to 717,615, 1,070,800.38 and 642,216.96 is: 958,294.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,615 : 1,070,800.38 = 642,216.96 : x
  2. Step 2: Convert to fraction form
    717,615/1,070,800.38 = 642,216.96/x
  3. Step 3: Cross multiply
    717,615x = 1,070,800.38 × 642,216.96
  4. Step 4: Simplify right side
    717,615x = 687,686,164,810.45
  5. Step 5: Solve for x
    x = 687,686,164,810.45/717,615
  6. Step 6: Final answer
    x = 958,294.02

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.