Home / 642,830.15-887,045.91-356,325.86

Finding the Fourth Proportional to 642,830.15, 887,045.91 and 356,325.86

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Solution

The fourth proportional to 642,830.15, 887,045.91 and 356,325.86 is: 491,696.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,830.15 : 887,045.91 = 356,325.86 : x
  2. Step 2: Convert to fraction form
    642,830.15/887,045.91 = 356,325.86/x
  3. Step 3: Cross multiply
    642,830.15x = 887,045.91 × 356,325.86
  4. Step 4: Simplify right side
    642,830.15x = 316,077,396,740.23
  5. Step 5: Solve for x
    x = 316,077,396,740.23/642,830.15
  6. Step 6: Final answer
    x = 491,696.60

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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.