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Finding the Fourth Proportional to 662,950.67, 914,828.82 and 390,956.21

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Solution

The fourth proportional to 662,950.67, 914,828.82 and 390,956.21 is: 539,494.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,950.67 : 914,828.82 = 390,956.21 : x
  2. Step 2: Convert to fraction form
    662,950.67/914,828.82 = 390,956.21/x
  3. Step 3: Cross multiply
    662,950.67x = 914,828.82 × 390,956.21
  4. Step 4: Simplify right side
    662,950.67x = 357,658,003,691.83
  5. Step 5: Solve for x
    x = 357,658,003,691.83/662,950.67
  6. Step 6: Final answer
    x = 539,494.15

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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.