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Finding the Fourth Proportional to 1,931.76, 2,898.12 and 777.50

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Solution

The fourth proportional to 1,931.76, 2,898.12 and 777.50 is: 1,166.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,931.76 : 2,898.12 = 777.50 : x
  2. Step 2: Convert to fraction form
    1,931.76/2,898.12 = 777.50/x
  3. Step 3: Cross multiply
    1,931.76x = 2,898.12 × 777.50
  4. Step 4: Simplify right side
    1,931.76x = 2,253,288.30
  5. Step 5: Solve for x
    x = 2,253,288.30/1,931.76
  6. Step 6: Final answer
    x = 1,166.44

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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.