Home / 642,821.40-887,033.88-356,317.11

Finding the Fourth Proportional to 642,821.40, 887,033.88 and 356,317.11

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Solution

The fourth proportional to 642,821.40, 887,033.88 and 356,317.11 is: 491,684.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,821.40 : 887,033.88 = 356,317.11 : x
  2. Step 2: Convert to fraction form
    642,821.40/887,033.88 = 356,317.11/x
  3. Step 3: Cross multiply
    642,821.40x = 887,033.88 × 356,317.11
  4. Step 4: Simplify right side
    642,821.40x = 316,065,348,593.69
  5. Step 5: Solve for x
    x = 316,065,348,593.69/642,821.40
  6. Step 6: Final answer
    x = 491,684.55

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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.