Home / 728,421.90-1,091,648.70-487,851.90

Finding the Fourth Proportional to 728,421.90, 1,091,648.70 and 487,851.90

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Solution

The fourth proportional to 728,421.90, 1,091,648.70 and 487,851.90 is: 731,118.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,421.90 : 1,091,648.70 = 487,851.90 : x
  2. Step 2: Convert to fraction form
    728,421.90/1,091,648.70 = 487,851.90/x
  3. Step 3: Cross multiply
    728,421.90x = 1,091,648.70 × 487,851.90
  4. Step 4: Simplify right side
    728,421.90x = 532,562,892,427.53
  5. Step 5: Solve for x
    x = 532,562,892,427.53/728,421.90
  6. Step 6: Final answer
    x = 731,118.73

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1.5x scale

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.