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Finding the Fourth Proportional to 288,009.30, 432,013.95 and 260,015.70

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Solution

The fourth proportional to 288,009.30, 432,013.95 and 260,015.70 is: 390,023.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,009.30 : 432,013.95 = 260,015.70 : x
  2. Step 2: Convert to fraction form
    288,009.30/432,013.95 = 260,015.70/x
  3. Step 3: Cross multiply
    288,009.30x = 432,013.95 × 260,015.70
  4. Step 4: Simplify right side
    288,009.30x = 112,330,409,619.02
  5. Step 5: Solve for x
    x = 112,330,409,619.02/288,009.30
  6. Step 6: Final answer
    x = 390,023.55

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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.