Home / 642,929.12-887,240.72-356,441.84

Finding the Fourth Proportional to 642,929.12, 887,240.72 and 356,441.84

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Solution

The fourth proportional to 642,929.12, 887,240.72 and 356,441.84 is: 491,888.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,929.12 : 887,240.72 = 356,441.84 : x
  2. Step 2: Convert to fraction form
    642,929.12/887,240.72 = 356,441.84/x
  3. Step 3: Cross multiply
    642,929.12x = 887,240.72 × 356,441.84
  4. Step 4: Simplify right side
    642,929.12x = 316,249,714,759.73
  5. Step 5: Solve for x
    x = 316,249,714,759.73/642,929.12
  6. Step 6: Final answer
    x = 491,888.93

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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.