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Finding the Fourth Proportional to 914.77, 1,371.63 and 469.60

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Solution

The fourth proportional to 914.77, 1,371.63 and 469.60 is: 704.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    914.77 : 1,371.63 = 469.60 : x
  2. Step 2: Convert to fraction form
    914.77/1,371.63 = 469.60/x
  3. Step 3: Cross multiply
    914.77x = 1,371.63 × 469.60
  4. Step 4: Simplify right side
    914.77x = 644,117.45
  5. Step 5: Solve for x
    x = 644,117.45/914.77
  6. Step 6: Final answer
    x = 704.13

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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.