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Finding the Fourth Proportional to 287,440.40, 431,160.60 and 147,472.40

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Solution

The fourth proportional to 287,440.40, 431,160.60 and 147,472.40 is: 221,208.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,440.40 : 431,160.60 = 147,472.40 : x
  2. Step 2: Convert to fraction form
    287,440.40/431,160.60 = 147,472.40/x
  3. Step 3: Cross multiply
    287,440.40x = 431,160.60 × 147,472.40
  4. Step 4: Simplify right side
    287,440.40x = 63,584,288,467.44
  5. Step 5: Solve for x
    x = 63,584,288,467.44/287,440.40
  6. Step 6: Final answer
    x = 221,208.60

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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.