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Finding the Fourth Proportional to 621,521.51, 857,691.06 and 349,589.59

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Solution

The fourth proportional to 621,521.51, 857,691.06 and 349,589.59 is: 482,428.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,521.51 : 857,691.06 = 349,589.59 : x
  2. Step 2: Convert to fraction form
    621,521.51/857,691.06 = 349,589.59/x
  3. Step 3: Cross multiply
    621,521.51x = 857,691.06 × 349,589.59
  4. Step 4: Simplify right side
    621,521.51x = 299,839,864,523.32
  5. Step 5: Solve for x
    x = 299,839,864,523.32/621,521.51
  6. Step 6: Final answer
    x = 482,428.79

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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.