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Finding the Fourth Proportional to 642,962.80, 964,079.70 and 243,616.60

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Solution

The fourth proportional to 642,962.80, 964,079.70 and 243,616.60 is: 365,286.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,962.80 : 964,079.70 = 243,616.60 : x
  2. Step 2: Convert to fraction form
    642,962.80/964,079.70 = 243,616.60/x
  3. Step 3: Cross multiply
    642,962.80x = 964,079.70 × 243,616.60
  4. Step 4: Simplify right side
    642,962.80x = 234,865,818,643.02
  5. Step 5: Solve for x
    x = 234,865,818,643.02/642,962.80
  6. Step 6: Final answer
    x = 365,286.79

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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.