Home / 515,085.20-710,815.36-288,730.72

Finding the Fourth Proportional to 515,085.20, 710,815.36 and 288,730.72

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Solution

The fourth proportional to 515,085.20, 710,815.36 and 288,730.72 is: 398,447.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,085.20 : 710,815.36 = 288,730.72 : x
  2. Step 2: Convert to fraction form
    515,085.20/710,815.36 = 288,730.72/x
  3. Step 3: Cross multiply
    515,085.20x = 710,815.36 × 288,730.72
  4. Step 4: Simplify right side
    515,085.20x = 205,234,230,679.86
  5. Step 5: Solve for x
    x = 205,234,230,679.86/515,085.20
  6. Step 6: Final answer
    x = 398,447.15

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1.5x scale

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.