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Finding the Fourth Proportional to 338,966.40, 508,449.60 and 86,246.40

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Solution

The fourth proportional to 338,966.40, 508,449.60 and 86,246.40 is: 129,369.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,966.40 : 508,449.60 = 86,246.40 : x
  2. Step 2: Convert to fraction form
    338,966.40/508,449.60 = 86,246.40/x
  3. Step 3: Cross multiply
    338,966.40x = 508,449.60 × 86,246.40
  4. Step 4: Simplify right side
    338,966.40x = 43,851,947,581.44
  5. Step 5: Solve for x
    x = 43,851,947,581.44/338,966.40
  6. Step 6: Final answer
    x = 129,369.60

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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.