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Finding the Fourth Proportional to 847,511.10, 1,270,602 and 398,000.61

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Solution

The fourth proportional to 847,511.10, 1,270,602 and 398,000.61 is: 596,688.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    847,511.10 : 1,270,602 = 398,000.61 : x
  2. Step 2: Convert to fraction form
    847,511.10/1,270,602 = 398,000.61/x
  3. Step 3: Cross multiply
    847,511.10x = 1,270,602 × 398,000.61
  4. Step 4: Simplify right side
    847,511.10x = 505,700,371,067.22
  5. Step 5: Solve for x
    x = 505,700,371,067.22/847,511.10
  6. Step 6: Final answer
    x = 596,688.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.