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Finding the Fourth Proportional to 689,398.90, 951,427.96 and 383,532.91

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Solution

The fourth proportional to 689,398.90, 951,427.96 and 383,532.91 is: 529,307.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,398.90 : 951,427.96 = 383,532.91 : x
  2. Step 2: Convert to fraction form
    689,398.90/951,427.96 = 383,532.91/x
  3. Step 3: Cross multiply
    689,398.90x = 951,427.96 × 383,532.91
  4. Step 4: Simplify right side
    689,398.90x = 364,903,930,816.76
  5. Step 5: Solve for x
    x = 364,903,930,816.76/689,398.90
  6. Step 6: Final answer
    x = 529,307.39

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Double scale
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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.