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Finding the Fourth Proportional to 1,117.37, 1,543.79 and 930.26

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Solution

The fourth proportional to 1,117.37, 1,543.79 and 930.26 is: 1,285.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,117.37 : 1,543.79 = 930.26 : x
  2. Step 2: Convert to fraction form
    1,117.37/1,543.79 = 930.26/x
  3. Step 3: Cross multiply
    1,117.37x = 1,543.79 × 930.26
  4. Step 4: Simplify right side
    1,117.37x = 1,436,126.09
  5. Step 5: Solve for x
    x = 1,436,126.09/1,117.37
  6. Step 6: Final answer
    x = 1,285.27

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1.5x scale

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.