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Finding the Fourth Proportional to 417,745.60, 626,812.80 and 218,291.20

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Solution

The fourth proportional to 417,745.60, 626,812.80 and 218,291.20 is: 327,538.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    417,745.60 : 626,812.80 = 218,291.20 : x
  2. Step 2: Convert to fraction form
    417,745.60/626,812.80 = 218,291.20/x
  3. Step 3: Cross multiply
    417,745.60x = 626,812.80 × 218,291.20
  4. Step 4: Simplify right side
    417,745.60x = 136,827,718,287.36
  5. Step 5: Solve for x
    x = 136,827,718,287.36/417,745.60
  6. Step 6: Final answer
    x = 327,538.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.