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Finding the Fourth Proportional to 1,640.79, 2,264.76 and 1,117.11

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Solution

The fourth proportional to 1,640.79, 2,264.76 and 1,117.11 is: 1,541.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,640.79 : 2,264.76 = 1,117.11 : x
  2. Step 2: Convert to fraction form
    1,640.79/2,264.76 = 1,117.11/x
  3. Step 3: Cross multiply
    1,640.79x = 2,264.76 × 1,117.11
  4. Step 4: Simplify right side
    1,640.79x = 2,529,986.04
  5. Step 5: Solve for x
    x = 2,529,986.04/1,640.79
  6. Step 6: Final answer
    x = 1,541.93

Related Problems

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Half scale
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Double scale
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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.