Home / 729,147.51-1,006,073.28-418,990.17

Finding the Fourth Proportional to 729,147.51, 1,006,073.28 and 418,990.17

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Solution

The fourth proportional to 729,147.51, 1,006,073.28 and 418,990.17 is: 578,120.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    729,147.51 : 1,006,073.28 = 418,990.17 : x
  2. Step 2: Convert to fraction form
    729,147.51/1,006,073.28 = 418,990.17/x
  3. Step 3: Cross multiply
    729,147.51x = 1,006,073.28 × 418,990.17
  4. Step 4: Simplify right side
    729,147.51x = 421,534,814,619.66
  5. Step 5: Solve for x
    x = 421,534,814,619.66/729,147.51
  6. Step 6: Final answer
    x = 578,120.08

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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.