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Finding the Fourth Proportional to 1,061.67, 1,465.22 and 619.72

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Solution

The fourth proportional to 1,061.67, 1,465.22 and 619.72 is: 855.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,061.67 : 1,465.22 = 619.72 : x
  2. Step 2: Convert to fraction form
    1,061.67/1,465.22 = 619.72/x
  3. Step 3: Cross multiply
    1,061.67x = 1,465.22 × 619.72
  4. Step 4: Simplify right side
    1,061.67x = 908,024.02
  5. Step 5: Solve for x
    x = 908,024.02/1,061.67
  6. Step 6: Final answer
    x = 855.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.