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Finding the Fourth Proportional to 289,015.89, 433,515.71 and 78,655.65

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Solution

The fourth proportional to 289,015.89, 433,515.71 and 78,655.65 is: 117,981.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,015.89 : 433,515.71 = 78,655.65 : x
  2. Step 2: Convert to fraction form
    289,015.89/433,515.71 = 78,655.65/x
  3. Step 3: Cross multiply
    289,015.89x = 433,515.71 × 78,655.65
  4. Step 4: Simplify right side
    289,015.89x = 34,098,459,561.98
  5. Step 5: Solve for x
    x = 34,098,459,561.98/289,015.89
  6. Step 6: Final answer
    x = 117,981.26

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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.