Home / 860,649.20-1,187,612.80-498,000.88

Finding the Fourth Proportional to 860,649.20, 1,187,612.80 and 498,000.88

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Solution

The fourth proportional to 860,649.20, 1,187,612.80 and 498,000.88 is: 687,193.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,649.20 : 1,187,612.80 = 498,000.88 : x
  2. Step 2: Convert to fraction form
    860,649.20/1,187,612.80 = 498,000.88/x
  3. Step 3: Cross multiply
    860,649.20x = 1,187,612.80 × 498,000.88
  4. Step 4: Simplify right side
    860,649.20x = 591,432,219,499.26
  5. Step 5: Solve for x
    x = 591,432,219,499.26/860,649.20
  6. Step 6: Final answer
    x = 687,193.13

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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.