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Finding the Fourth Proportional to 289,218.80, 433,536.60 and 131,560.40

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Solution

The fourth proportional to 289,218.80, 433,536.60 and 131,560.40 is: 197,207.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,218.80 : 433,536.60 = 131,560.40 : x
  2. Step 2: Convert to fraction form
    289,218.80/433,536.60 = 131,560.40/x
  3. Step 3: Cross multiply
    289,218.80x = 433,536.60 × 131,560.40
  4. Step 4: Simplify right side
    289,218.80x = 57,036,248,510.64
  5. Step 5: Solve for x
    x = 57,036,248,510.64/289,218.80
  6. Step 6: Final answer
    x = 197,207.96

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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.