Home / 643,035.27-887,428.56-356,555.36

Finding the Fourth Proportional to 643,035.27, 887,428.56 and 356,555.36

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Solution

The fourth proportional to 643,035.27, 887,428.56 and 356,555.36 is: 492,068.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,035.27 : 887,428.56 = 356,555.36 : x
  2. Step 2: Convert to fraction form
    643,035.27/887,428.56 = 356,555.36/x
  3. Step 3: Cross multiply
    643,035.27x = 887,428.56 × 356,555.36
  4. Step 4: Simplify right side
    643,035.27x = 316,417,408,248.95
  5. Step 5: Solve for x
    x = 316,417,408,248.95/643,035.27
  6. Step 6: Final answer
    x = 492,068.51

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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.