Home / 744,341.70-1,116,512.55-428,538.90

Finding the Fourth Proportional to 744,341.70, 1,116,512.55 and 428,538.90

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Solution

The fourth proportional to 744,341.70, 1,116,512.55 and 428,538.90 is: 642,808.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    744,341.70 : 1,116,512.55 = 428,538.90 : x
  2. Step 2: Convert to fraction form
    744,341.70/1,116,512.55 = 428,538.90/x
  3. Step 3: Cross multiply
    744,341.70x = 1,116,512.55 × 428,538.90
  4. Step 4: Simplify right side
    744,341.70x = 478,469,060,013.20
  5. Step 5: Solve for x
    x = 478,469,060,013.20/744,341.70
  6. Step 6: Final answer
    x = 642,808.35

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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.