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Finding the Fourth Proportional to 385,999.80, 532,679.32 and 216,235.12

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Solution

The fourth proportional to 385,999.80, 532,679.32 and 216,235.12 is: 298,404.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,999.80 : 532,679.32 = 216,235.12 : x
  2. Step 2: Convert to fraction form
    385,999.80/532,679.32 = 216,235.12/x
  3. Step 3: Cross multiply
    385,999.80x = 532,679.32 × 216,235.12
  4. Step 4: Simplify right side
    385,999.80x = 115,183,976,681.72
  5. Step 5: Solve for x
    x = 115,183,976,681.72/385,999.80
  6. Step 6: Final answer
    x = 298,404.24

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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.