Home / 515,422.85-772,345.18-215,740.26

Finding the Fourth Proportional to 515,422.85, 772,345.18 and 215,740.26

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Solution

The fourth proportional to 515,422.85, 772,345.18 and 215,740.26 is: 323,280.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,422.85 : 772,345.18 = 215,740.26 : x
  2. Step 2: Convert to fraction form
    515,422.85/772,345.18 = 215,740.26/x
  3. Step 3: Cross multiply
    515,422.85x = 772,345.18 × 215,740.26
  4. Step 4: Simplify right side
    515,422.85x = 166,625,948,999.08
  5. Step 5: Solve for x
    x = 166,625,948,999.08/515,422.85
  6. Step 6: Final answer
    x = 323,280.10

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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.