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Finding the Fourth Proportional to 689,294.58, 951,085.68 and 402,759.30

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Solution

The fourth proportional to 689,294.58, 951,085.68 and 402,759.30 is: 555,725.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,294.58 : 951,085.68 = 402,759.30 : x
  2. Step 2: Convert to fraction form
    689,294.58/951,085.68 = 402,759.30/x
  3. Step 3: Cross multiply
    689,294.58x = 951,085.68 × 402,759.30
  4. Step 4: Simplify right side
    689,294.58x = 383,058,602,716.82
  5. Step 5: Solve for x
    x = 383,058,602,716.82/689,294.58
  6. Step 6: Final answer
    x = 555,725.54

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Double scale
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Similar ratio
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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.