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Finding the Fourth Proportional to 1,088.95, 1,503.38 and 717.01

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Solution

The fourth proportional to 1,088.95, 1,503.38 and 717.01 is: 989.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,088.95 : 1,503.38 = 717.01 : x
  2. Step 2: Convert to fraction form
    1,088.95/1,503.38 = 717.01/x
  3. Step 3: Cross multiply
    1,088.95x = 1,503.38 × 717.01
  4. Step 4: Simplify right side
    1,088.95x = 1,077,943.24
  5. Step 5: Solve for x
    x = 1,077,943.24/1,088.95
  6. Step 6: Final answer
    x = 989.89

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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.