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Finding the Fourth Proportional to 289,025.70, 433,538.55 and 78,663.30

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Solution

The fourth proportional to 289,025.70, 433,538.55 and 78,663.30 is: 117,994.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,025.70 : 433,538.55 = 78,663.30 : x
  2. Step 2: Convert to fraction form
    289,025.70/433,538.55 = 78,663.30/x
  3. Step 3: Cross multiply
    289,025.70x = 433,538.55 × 78,663.30
  4. Step 4: Simplify right side
    289,025.70x = 34,103,573,020.22
  5. Step 5: Solve for x
    x = 34,103,573,020.22/289,025.70
  6. Step 6: Final answer
    x = 117,994.95

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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.