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Finding the Fourth Proportional to 378,417.18, 522,228.16 and 217,300.90

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Solution

The fourth proportional to 378,417.18, 522,228.16 and 217,300.90 is: 299,882.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,417.18 : 522,228.16 = 217,300.90 : x
  2. Step 2: Convert to fraction form
    378,417.18/522,228.16 = 217,300.90/x
  3. Step 3: Cross multiply
    378,417.18x = 522,228.16 × 217,300.90
  4. Step 4: Simplify right side
    378,417.18x = 113,480,649,173.34
  5. Step 5: Solve for x
    x = 113,480,649,173.34/378,417.18
  6. Step 6: Final answer
    x = 299,882.39

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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.