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Finding the Fourth Proportional to 847.77, 1,271.33 and 340.47

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Solution

The fourth proportional to 847.77, 1,271.33 and 340.47 is: 510.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    847.77 : 1,271.33 = 340.47 : x
  2. Step 2: Convert to fraction form
    847.77/1,271.33 = 340.47/x
  3. Step 3: Cross multiply
    847.77x = 1,271.33 × 340.47
  4. Step 4: Simplify right side
    847.77x = 432,849.30
  5. Step 5: Solve for x
    x = 432,849.30/847.77
  6. Step 6: Final answer
    x = 510.57

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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.