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Finding the Fourth Proportional to 689,679.30, 951,444.82 and 498,389.70

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Solution

The fourth proportional to 689,679.30, 951,444.82 and 498,389.70 is: 687,551.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,679.30 : 951,444.82 = 498,389.70 : x
  2. Step 2: Convert to fraction form
    689,679.30/951,444.82 = 498,389.70/x
  3. Step 3: Cross multiply
    689,679.30x = 951,444.82 × 498,389.70
  4. Step 4: Simplify right side
    689,679.30x = 474,190,298,406.35
  5. Step 5: Solve for x
    x = 474,190,298,406.35/689,679.30
  6. Step 6: Final answer
    x = 687,551.88

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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.