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Finding the Fourth Proportional to 389,374.80, 537,336.16 and 217,290.92

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Solution

The fourth proportional to 389,374.80, 537,336.16 and 217,290.92 is: 299,860.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,374.80 : 537,336.16 = 217,290.92 : x
  2. Step 2: Convert to fraction form
    389,374.80/537,336.16 = 217,290.92/x
  3. Step 3: Cross multiply
    389,374.80x = 537,336.16 × 217,290.92
  4. Step 4: Simplify right side
    389,374.80x = 116,758,268,555.67
  5. Step 5: Solve for x
    x = 116,758,268,555.67/389,374.80
  6. Step 6: Final answer
    x = 299,860.88

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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.