Home / 787,139.60-1,182,021.60-432,408.20

Finding the Fourth Proportional to 787,139.60, 1,182,021.60 and 432,408.20

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Solution

The fourth proportional to 787,139.60, 1,182,021.60 and 432,408.20 is: 649,333.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    787,139.60 : 1,182,021.60 = 432,408.20 : x
  2. Step 2: Convert to fraction form
    787,139.60/1,182,021.60 = 432,408.20/x
  3. Step 3: Cross multiply
    787,139.60x = 1,182,021.60 × 432,408.20
  4. Step 4: Simplify right side
    787,139.60x = 511,115,832,417.12
  5. Step 5: Solve for x
    x = 511,115,832,417.12/787,139.60
  6. Step 6: Final answer
    x = 649,333.15

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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.