Home / 766,139.04-1,148,409.96-428,684.92

Finding the Fourth Proportional to 766,139.04, 1,148,409.96 and 428,684.92

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Solution

The fourth proportional to 766,139.04, 1,148,409.96 and 428,684.92 is: 642,580.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    766,139.04 : 1,148,409.96 = 428,684.92 : x
  2. Step 2: Convert to fraction form
    766,139.04/1,148,409.96 = 428,684.92/x
  3. Step 3: Cross multiply
    766,139.04x = 1,148,409.96 × 428,684.92
  4. Step 4: Simplify right side
    766,139.04x = 492,306,031,829.80
  5. Step 5: Solve for x
    x = 492,306,031,829.80/766,139.04
  6. Step 6: Final answer
    x = 642,580.53

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Double scale
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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.