Home / 765,448.19-1,148,430.40-338,925.78

Finding the Fourth Proportional to 765,448.19, 1,148,430.40 and 338,925.78

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Solution

The fourth proportional to 765,448.19, 1,148,430.40 and 338,925.78 is: 508,502.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    765,448.19 : 1,148,430.40 = 338,925.78 : x
  2. Step 2: Convert to fraction form
    765,448.19/1,148,430.40 = 338,925.78/x
  3. Step 3: Cross multiply
    765,448.19x = 1,148,430.40 × 338,925.78
  4. Step 4: Simplify right side
    765,448.19x = 389,232,668,248.40
  5. Step 5: Solve for x
    x = 389,232,668,248.40/765,448.19
  6. Step 6: Final answer
    x = 508,502.96

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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.