Home / 728,914.06-1,006,012.20-442,378.72

Finding the Fourth Proportional to 728,914.06, 1,006,012.20 and 442,378.72

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Solution

The fourth proportional to 728,914.06, 1,006,012.20 and 442,378.72 is: 610,549.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,914.06 : 1,006,012.20 = 442,378.72 : x
  2. Step 2: Convert to fraction form
    728,914.06/1,006,012.20 = 442,378.72/x
  3. Step 3: Cross multiply
    728,914.06x = 1,006,012.20 × 442,378.72
  4. Step 4: Simplify right side
    728,914.06x = 445,038,389,340.38
  5. Step 5: Solve for x
    x = 445,038,389,340.38/728,914.06
  6. Step 6: Final answer
    x = 610,549.88

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.