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Finding the Fourth Proportional to 1,070.72, 1,477.74 and 605

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Solution

The fourth proportional to 1,070.72, 1,477.74 and 605 is: 834.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,070.72 : 1,477.74 = 605 : x
  2. Step 2: Convert to fraction form
    1,070.72/1,477.74 = 605/x
  3. Step 3: Cross multiply
    1,070.72x = 1,477.74 × 605
  4. Step 4: Simplify right side
    1,070.72x = 894,032.70
  5. Step 5: Solve for x
    x = 894,032.70/1,070.72
  6. Step 6: Final answer
    x = 834.98

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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.