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Finding the Fourth Proportional to 346,481.40, 478,130.72 and 217,489.44

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Solution

The fourth proportional to 346,481.40, 478,130.72 and 217,489.44 is: 300,126.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,481.40 : 478,130.72 = 217,489.44 : x
  2. Step 2: Convert to fraction form
    346,481.40/478,130.72 = 217,489.44/x
  3. Step 3: Cross multiply
    346,481.40x = 478,130.72 × 217,489.44
  4. Step 4: Simplify right side
    346,481.40x = 103,988,382,539.60
  5. Step 5: Solve for x
    x = 103,988,382,539.60/346,481.40
  6. Step 6: Final answer
    x = 300,126.88

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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.