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Finding the Fourth Proportional to 661,648.50, 992,472.75 and 287,671.50

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Solution

The fourth proportional to 661,648.50, 992,472.75 and 287,671.50 is: 431,507.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,648.50 : 992,472.75 = 287,671.50 : x
  2. Step 2: Convert to fraction form
    661,648.50/992,472.75 = 287,671.50/x
  3. Step 3: Cross multiply
    661,648.50x = 992,472.75 × 287,671.50
  4. Step 4: Simplify right side
    661,648.50x = 285,506,124,701.63
  5. Step 5: Solve for x
    x = 285,506,124,701.63/661,648.50
  6. Step 6: Final answer
    x = 431,507.25

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Similar ratio
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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.