Home / 726,275.16-1,002,189.36-420,290.76

Finding the Fourth Proportional to 726,275.16, 1,002,189.36 and 420,290.76

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Solution

The fourth proportional to 726,275.16, 1,002,189.36 and 420,290.76 is: 579,960.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    726,275.16 : 1,002,189.36 = 420,290.76 : x
  2. Step 2: Convert to fraction form
    726,275.16/1,002,189.36 = 420,290.76/x
  3. Step 3: Cross multiply
    726,275.16x = 1,002,189.36 × 420,290.76
  4. Step 4: Simplify right side
    726,275.16x = 421,210,927,778.31
  5. Step 5: Solve for x
    x = 421,210,927,778.31/726,275.16
  6. Step 6: Final answer
    x = 579,960.53

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Half scale
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Double scale
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Similar ratio
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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.