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Finding the Fourth Proportional to 287,614.65, 397,625.63 and 215,870.12

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Solution

The fourth proportional to 287,614.65, 397,625.63 and 215,870.12 is: 298,439.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,614.65 : 397,625.63 = 215,870.12 : x
  2. Step 2: Convert to fraction form
    287,614.65/397,625.63 = 215,870.12/x
  3. Step 3: Cross multiply
    287,614.65x = 397,625.63 × 215,870.12
  4. Step 4: Simplify right side
    287,614.65x = 85,835,492,463.18
  5. Step 5: Solve for x
    x = 85,835,492,463.18/287,614.65
  6. Step 6: Final answer
    x = 298,439.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.