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Finding the Fourth Proportional to 288,015.80, 432,023.70 and 260,022.20

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Solution

The fourth proportional to 288,015.80, 432,023.70 and 260,022.20 is: 390,033.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,015.80 : 432,023.70 = 260,022.20 : x
  2. Step 2: Convert to fraction form
    288,015.80/432,023.70 = 260,022.20/x
  3. Step 3: Cross multiply
    288,015.80x = 432,023.70 × 260,022.20
  4. Step 4: Simplify right side
    288,015.80x = 112,335,752,926.14
  5. Step 5: Solve for x
    x = 112,335,752,926.14/288,015.80
  6. Step 6: Final answer
    x = 390,033.30

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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.