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Finding the Fourth Proportional to 1,055.85, 1,456.95 and 607.71

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Solution

The fourth proportional to 1,055.85, 1,456.95 and 607.71 is: 838.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,055.85 : 1,456.95 = 607.71 : x
  2. Step 2: Convert to fraction form
    1,055.85/1,456.95 = 607.71/x
  3. Step 3: Cross multiply
    1,055.85x = 1,456.95 × 607.71
  4. Step 4: Simplify right side
    1,055.85x = 885,403.08
  5. Step 5: Solve for x
    x = 885,403.08/1,055.85
  6. Step 6: Final answer
    x = 838.57

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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.