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Finding the Fourth Proportional to 287,587.80, 431,381.70 and 181,299.60

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Solution

The fourth proportional to 287,587.80, 431,381.70 and 181,299.60 is: 271,949.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,587.80 : 431,381.70 = 181,299.60 : x
  2. Step 2: Convert to fraction form
    287,587.80/431,381.70 = 181,299.60/x
  3. Step 3: Cross multiply
    287,587.80x = 431,381.70 × 181,299.60
  4. Step 4: Simplify right side
    287,587.80x = 78,209,329,657.32
  5. Step 5: Solve for x
    x = 78,209,329,657.32/287,587.80
  6. Step 6: Final answer
    x = 271,949.40

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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.