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Finding the Fourth Proportional to 318,870.52, 440,024.69 and 198,009.20

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Solution

The fourth proportional to 318,870.52, 440,024.69 and 198,009.20 is: 273,242.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,870.52 : 440,024.69 = 198,009.20 : x
  2. Step 2: Convert to fraction form
    318,870.52/440,024.69 = 198,009.20/x
  3. Step 3: Cross multiply
    318,870.52x = 440,024.69 × 198,009.20
  4. Step 4: Simplify right side
    318,870.52x = 87,128,938,442.23
  5. Step 5: Solve for x
    x = 87,128,938,442.23/318,870.52
  6. Step 6: Final answer
    x = 273,242.38

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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.