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Finding the Fourth Proportional to 287,589.04, 431,384.62 and 87,908.65

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Solution

The fourth proportional to 287,589.04, 431,384.62 and 87,908.65 is: 131,863.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,589.04 : 431,384.62 = 87,908.65 : x
  2. Step 2: Convert to fraction form
    287,589.04/431,384.62 = 87,908.65/x
  3. Step 3: Cross multiply
    287,589.04x = 431,384.62 × 87,908.65
  4. Step 4: Simplify right side
    287,589.04x = 37,922,439,574.96
  5. Step 5: Solve for x
    x = 37,922,439,574.96/287,589.04
  6. Step 6: Final answer
    x = 131,863.30

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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.