Home / 643,114.10-887,439.30-356,633.30

Finding the Fourth Proportional to 643,114.10, 887,439.30 and 356,633.30

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Solution

The fourth proportional to 643,114.10, 887,439.30 and 356,633.30 is: 492,121.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,114.10 : 887,439.30 = 356,633.30 : x
  2. Step 2: Convert to fraction form
    643,114.10/887,439.30 = 356,633.30/x
  3. Step 3: Cross multiply
    643,114.10x = 887,439.30 × 356,633.30
  4. Step 4: Simplify right side
    643,114.10x = 316,490,406,108.69
  5. Step 5: Solve for x
    x = 316,490,406,108.69/643,114.10
  6. Step 6: Final answer
    x = 492,121.70

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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.