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Finding the Fourth Proportional to 812,793.78, 1,121,549.13 and 468,642.66

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Solution

The fourth proportional to 812,793.78, 1,121,549.13 and 468,642.66 is: 646,665.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,793.78 : 1,121,549.13 = 468,642.66 : x
  2. Step 2: Convert to fraction form
    812,793.78/1,121,549.13 = 468,642.66/x
  3. Step 3: Cross multiply
    812,793.78x = 1,121,549.13 × 468,642.66
  4. Step 4: Simplify right side
    812,793.78x = 525,605,767,603.89
  5. Step 5: Solve for x
    x = 525,605,767,603.89/812,793.78
  6. Step 6: Final answer
    x = 646,665.59

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Double scale
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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.