Home / 638,331.20-955,653.60-389,499.20

Finding the Fourth Proportional to 638,331.20, 955,653.60 and 389,499.20

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Solution

The fourth proportional to 638,331.20, 955,653.60 and 389,499.20 is: 583,124.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,331.20 : 955,653.60 = 389,499.20 : x
  2. Step 2: Convert to fraction form
    638,331.20/955,653.60 = 389,499.20/x
  3. Step 3: Cross multiply
    638,331.20x = 955,653.60 × 389,499.20
  4. Step 4: Simplify right side
    638,331.20x = 372,226,312,677.12
  5. Step 5: Solve for x
    x = 372,226,312,677.12/638,331.20
  6. Step 6: Final answer
    x = 583,124.11

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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.