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Finding the Fourth Proportional to 628,736.64, 867,658.56 and 342,259.20

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Solution

The fourth proportional to 628,736.64, 867,658.56 and 342,259.20 is: 472,318.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,736.64 : 867,658.56 = 342,259.20 : x
  2. Step 2: Convert to fraction form
    628,736.64/867,658.56 = 342,259.20/x
  3. Step 3: Cross multiply
    628,736.64x = 867,658.56 × 342,259.20
  4. Step 4: Simplify right side
    628,736.64x = 296,964,124,618.75
  5. Step 5: Solve for x
    x = 296,964,124,618.75/628,736.64
  6. Step 6: Final answer
    x = 472,318.78

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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.