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Finding the Fourth Proportional to 288,417.26, 398,019.30 and 159,355.20

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Solution

The fourth proportional to 288,417.26, 398,019.30 and 159,355.20 is: 219,912.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,417.26 : 398,019.30 = 159,355.20 : x
  2. Step 2: Convert to fraction form
    288,417.26/398,019.30 = 159,355.20/x
  3. Step 3: Cross multiply
    288,417.26x = 398,019.30 × 159,355.20
  4. Step 4: Simplify right side
    288,417.26x = 63,426,445,155.36
  5. Step 5: Solve for x
    x = 63,426,445,155.36/288,417.26
  6. Step 6: Final answer
    x = 219,912.10

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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.