Home / 643,896.10-888,580.11-402,318.85

Finding the Fourth Proportional to 643,896.10, 888,580.11 and 402,318.85

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Solution

The fourth proportional to 643,896.10, 888,580.11 and 402,318.85 is: 555,202.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,896.10 : 888,580.11 = 402,318.85 : x
  2. Step 2: Convert to fraction form
    643,896.10/888,580.11 = 402,318.85/x
  3. Step 3: Cross multiply
    643,896.10x = 888,580.11 × 402,318.85
  4. Step 4: Simplify right side
    643,896.10x = 357,492,527,988.07
  5. Step 5: Solve for x
    x = 357,492,527,988.07/643,896.10
  6. Step 6: Final answer
    x = 555,202.19

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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.