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Finding the Fourth Proportional to 259,483.60, 389,225.40 and 147,120.40

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Solution

The fourth proportional to 259,483.60, 389,225.40 and 147,120.40 is: 220,680.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,483.60 : 389,225.40 = 147,120.40 : x
  2. Step 2: Convert to fraction form
    259,483.60/389,225.40 = 147,120.40/x
  3. Step 3: Cross multiply
    259,483.60x = 389,225.40 × 147,120.40
  4. Step 4: Simplify right side
    259,483.60x = 57,262,996,538.16
  5. Step 5: Solve for x
    x = 57,262,996,538.16/259,483.60
  6. Step 6: Final answer
    x = 220,680.60

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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.