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Finding the Fourth Proportional to 288,520.78, 398,269.80 and 258,252.70

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Solution

The fourth proportional to 288,520.78, 398,269.80 and 258,252.70 is: 356,488.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,520.78 : 398,269.80 = 258,252.70 : x
  2. Step 2: Convert to fraction form
    288,520.78/398,269.80 = 258,252.70/x
  3. Step 3: Cross multiply
    288,520.78x = 398,269.80 × 258,252.70
  4. Step 4: Simplify right side
    288,520.78x = 102,854,249,887.20
  5. Step 5: Solve for x
    x = 102,854,249,887.20/288,520.78
  6. Step 6: Final answer
    x = 356,488.19

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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.