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Finding the Fourth Proportional to 298,856.50, 448,282.52 and 85,624.59

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Solution

The fourth proportional to 298,856.50, 448,282.52 and 85,624.59 is: 128,436.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,856.50 : 448,282.52 = 85,624.59 : x
  2. Step 2: Convert to fraction form
    298,856.50/448,282.52 = 85,624.59/x
  3. Step 3: Cross multiply
    298,856.50x = 448,282.52 × 85,624.59
  4. Step 4: Simplify right side
    298,856.50x = 38,384,006,979.17
  5. Step 5: Solve for x
    x = 38,384,006,979.17/298,856.50
  6. Step 6: Final answer
    x = 128,436.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.