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Finding the Fourth Proportional to 259,482.60, 389,223.90 and 72,493.80

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Solution

The fourth proportional to 259,482.60, 389,223.90 and 72,493.80 is: 108,740.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,482.60 : 389,223.90 = 72,493.80 : x
  2. Step 2: Convert to fraction form
    259,482.60/389,223.90 = 72,493.80/x
  3. Step 3: Cross multiply
    259,482.60x = 389,223.90 × 72,493.80
  4. Step 4: Simplify right side
    259,482.60x = 28,216,319,561.82
  5. Step 5: Solve for x
    x = 28,216,319,561.82/259,482.60
  6. Step 6: Final answer
    x = 108,740.70

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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.