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Finding the Fourth Proportional to 287,756.48, 431,718.96 and 147,612.80

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Solution

The fourth proportional to 287,756.48, 431,718.96 and 147,612.80 is: 221,462.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,756.48 : 431,718.96 = 147,612.80 : x
  2. Step 2: Convert to fraction form
    287,756.48/431,718.96 = 147,612.80/x
  3. Step 3: Cross multiply
    287,756.48x = 431,718.96 × 147,612.80
  4. Step 4: Simplify right side
    287,756.48x = 63,727,244,498.69
  5. Step 5: Solve for x
    x = 63,727,244,498.69/287,756.48
  6. Step 6: Final answer
    x = 221,462.41

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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.