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Finding the Fourth Proportional to 287,586.30, 431,379.45 and 259,592.70

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Solution

The fourth proportional to 287,586.30, 431,379.45 and 259,592.70 is: 389,389.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,586.30 : 431,379.45 = 259,592.70 : x
  2. Step 2: Convert to fraction form
    287,586.30/431,379.45 = 259,592.70/x
  3. Step 3: Cross multiply
    287,586.30x = 431,379.45 × 259,592.70
  4. Step 4: Simplify right side
    287,586.30x = 111,982,956,150.02
  5. Step 5: Solve for x
    x = 111,982,956,150.02/287,586.30
  6. Step 6: Final answer
    x = 389,389.05

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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.