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Finding the Fourth Proportional to 931,498.76, 1,396,079.10 and 398,393

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Solution

The fourth proportional to 931,498.76, 1,396,079.10 and 398,393 is: 597,089.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    931,498.76 : 1,396,079.10 = 398,393 : x
  2. Step 2: Convert to fraction form
    931,498.76/1,396,079.10 = 398,393/x
  3. Step 3: Cross multiply
    931,498.76x = 1,396,079.10 × 398,393
  4. Step 4: Simplify right side
    931,498.76x = 556,188,140,886.30
  5. Step 5: Solve for x
    x = 556,188,140,886.30/931,498.76
  6. Step 6: Final answer
    x = 597,089.51

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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.