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Finding the Fourth Proportional to 346,754.79, 478,386.44 and 217,617.90

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Solution

The fourth proportional to 346,754.79, 478,386.44 and 217,617.90 is: 300,227.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,754.79 : 478,386.44 = 217,617.90 : x
  2. Step 2: Convert to fraction form
    346,754.79/478,386.44 = 217,617.90/x
  3. Step 3: Cross multiply
    346,754.79x = 478,386.44 × 217,617.90
  4. Step 4: Simplify right side
    346,754.79x = 104,105,451,373.19
  5. Step 5: Solve for x
    x = 104,105,451,373.19/346,754.79
  6. Step 6: Final answer
    x = 300,227.87

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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.