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Finding the Fourth Proportional to 390,150.48, 538,451.52 and 220,395.60

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Solution

The fourth proportional to 390,150.48, 538,451.52 and 220,395.60 is: 304,170.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,150.48 : 538,451.52 = 220,395.60 : x
  2. Step 2: Convert to fraction form
    390,150.48/538,451.52 = 220,395.60/x
  3. Step 3: Cross multiply
    390,150.48x = 538,451.52 × 220,395.60
  4. Step 4: Simplify right side
    390,150.48x = 118,672,345,821.31
  5. Step 5: Solve for x
    x = 118,672,345,821.31/390,150.48
  6. Step 6: Final answer
    x = 304,170.70

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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.