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Finding the Fourth Proportional to 689,247.50, 951,021 and 402,712.22

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Solution

The fourth proportional to 689,247.50, 951,021 and 402,712.22 is: 555,660.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,247.50 : 951,021 = 402,712.22 : x
  2. Step 2: Convert to fraction form
    689,247.50/951,021 = 402,712.22/x
  3. Step 3: Cross multiply
    689,247.50x = 951,021 × 402,712.22
  4. Step 4: Simplify right side
    689,247.50x = 382,987,780,554.17
  5. Step 5: Solve for x
    x = 382,987,780,554.17/689,247.50
  6. Step 6: Final answer
    x = 555,660.75

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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.