Home / 439,205.20-657,349.80-318,920.20

Finding the Fourth Proportional to 439,205.20, 657,349.80 and 318,920.20

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Solution

The fourth proportional to 439,205.20, 657,349.80 and 318,920.20 is: 477,321.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,205.20 : 657,349.80 = 318,920.20 : x
  2. Step 2: Convert to fraction form
    439,205.20/657,349.80 = 318,920.20/x
  3. Step 3: Cross multiply
    439,205.20x = 657,349.80 × 318,920.20
  4. Step 4: Simplify right side
    439,205.20x = 209,642,129,685.96
  5. Step 5: Solve for x
    x = 209,642,129,685.96/439,205.20
  6. Step 6: Final answer
    x = 477,321.60

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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.