Home / 865,400.36-1,297,478.30-391,841.96

Finding the Fourth Proportional to 865,400.36, 1,297,478.30 and 391,841.96

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Solution

The fourth proportional to 865,400.36, 1,297,478.30 and 391,841.96 is: 587,481.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,400.36 : 1,297,478.30 = 391,841.96 : x
  2. Step 2: Convert to fraction form
    865,400.36/1,297,478.30 = 391,841.96/x
  3. Step 3: Cross multiply
    865,400.36x = 1,297,478.30 × 391,841.96
  4. Step 4: Simplify right side
    865,400.36x = 508,406,440,129.47
  5. Step 5: Solve for x
    x = 508,406,440,129.47/865,400.36
  6. Step 6: Final answer
    x = 587,481.20

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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.