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Finding the Fourth Proportional to 287,728.71, 397,056.51 and 158,672.63

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Solution

The fourth proportional to 287,728.71, 397,056.51 and 158,672.63 is: 218,963.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,728.71 : 397,056.51 = 158,672.63 : x
  2. Step 2: Convert to fraction form
    287,728.71/397,056.51 = 158,672.63/x
  3. Step 3: Cross multiply
    287,728.71x = 397,056.51 × 158,672.63
  4. Step 4: Simplify right side
    287,728.71x = 63,001,998,715.04
  5. Step 5: Solve for x
    x = 63,001,998,715.04/287,728.71
  6. Step 6: Final answer
    x = 218,963.20

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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.