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Finding the Fourth Proportional to 847.10, 1,271.45 and 436.52

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Solution

The fourth proportional to 847.10, 1,271.45 and 436.52 is: 655.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    847.10 : 1,271.45 = 436.52 : x
  2. Step 2: Convert to fraction form
    847.10/1,271.45 = 436.52/x
  3. Step 3: Cross multiply
    847.10x = 1,271.45 × 436.52
  4. Step 4: Simplify right side
    847.10x = 555,004.81
  5. Step 5: Solve for x
    x = 555,004.81/847.10
  6. Step 6: Final answer
    x = 655.19

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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.