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Finding the Fourth Proportional to 1,117, 1,541.55 and 651.34

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Solution

The fourth proportional to 1,117, 1,541.55 and 651.34 is: 898.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,117 : 1,541.55 = 651.34 : x
  2. Step 2: Convert to fraction form
    1,117/1,541.55 = 651.34/x
  3. Step 3: Cross multiply
    1,117x = 1,541.55 × 651.34
  4. Step 4: Simplify right side
    1,117x = 1,004,073.18
  5. Step 5: Solve for x
    x = 1,004,073.18/1,117
  6. Step 6: Final answer
    x = 898.90

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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.