Home / 765,402.90-1,148,363.80-338,879.90

Finding the Fourth Proportional to 765,402.90, 1,148,363.80 and 338,879.90

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Solution

The fourth proportional to 765,402.90, 1,148,363.80 and 338,879.90 is: 508,434.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    765,402.90 : 1,148,363.80 = 338,879.90 : x
  2. Step 2: Convert to fraction form
    765,402.90/1,148,363.80 = 338,879.90/x
  3. Step 3: Cross multiply
    765,402.90x = 1,148,363.80 × 338,879.90
  4. Step 4: Simplify right side
    765,402.90x = 389,157,403,965.80
  5. Step 5: Solve for x
    x = 389,157,403,965.80/765,402.90
  6. Step 6: Final answer
    x = 508,434.71

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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.