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Finding the Fourth Proportional to 520,712.15, 718,548.93 and 291,229.70

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Solution

The fourth proportional to 520,712.15, 718,548.93 and 291,229.70 is: 401,878.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,712.15 : 718,548.93 = 291,229.70 : x
  2. Step 2: Convert to fraction form
    520,712.15/718,548.93 = 291,229.70/x
  3. Step 3: Cross multiply
    520,712.15x = 718,548.93 × 291,229.70
  4. Step 4: Simplify right side
    520,712.15x = 209,262,785,726.48
  5. Step 5: Solve for x
    x = 209,262,785,726.48/520,712.15
  6. Step 6: Final answer
    x = 401,878.06

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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.