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Finding the Fourth Proportional to 346,754.61, 478,386.20 and 217,617.73

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Solution

The fourth proportional to 346,754.61, 478,386.20 and 217,617.73 is: 300,227.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,754.61 : 478,386.20 = 217,617.73 : x
  2. Step 2: Convert to fraction form
    346,754.61/478,386.20 = 217,617.73/x
  3. Step 3: Cross multiply
    346,754.61x = 478,386.20 × 217,617.73
  4. Step 4: Simplify right side
    346,754.61x = 104,105,318,540.33
  5. Step 5: Solve for x
    x = 104,105,318,540.33/346,754.61
  6. Step 6: Final answer
    x = 300,227.64

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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.