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Finding the Fourth Proportional to 628,552.25, 867,385.47 and 342,066.20

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Solution

The fourth proportional to 628,552.25, 867,385.47 and 342,066.20 is: 472,042.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,552.25 : 867,385.47 = 342,066.20 : x
  2. Step 2: Convert to fraction form
    628,552.25/867,385.47 = 342,066.20/x
  3. Step 3: Cross multiply
    628,552.25x = 867,385.47 × 342,066.20
  4. Step 4: Simplify right side
    628,552.25x = 296,703,251,658.11
  5. Step 5: Solve for x
    x = 296,703,251,658.11/628,552.25
  6. Step 6: Final answer
    x = 472,042.30

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Double scale
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Similar ratio
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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.