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Finding the Fourth Proportional to 631,775.74, 871,864.47 and 345,314.38

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Solution

The fourth proportional to 631,775.74, 871,864.47 and 345,314.38 is: 476,541.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,775.74 : 871,864.47 = 345,314.38 : x
  2. Step 2: Convert to fraction form
    631,775.74/871,864.47 = 345,314.38/x
  3. Step 3: Cross multiply
    631,775.74x = 871,864.47 × 345,314.38
  4. Step 4: Simplify right side
    631,775.74x = 301,067,338,902.08
  5. Step 5: Solve for x
    x = 301,067,338,902.08/631,775.74
  6. Step 6: Final answer
    x = 476,541.47

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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.