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Finding the Fourth Proportional to 1,115.55, 1,673.55 and 934.20

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Solution

The fourth proportional to 1,115.55, 1,673.55 and 934.20 is: 1,401.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,115.55 : 1,673.55 = 934.20 : x
  2. Step 2: Convert to fraction form
    1,115.55/1,673.55 = 934.20/x
  3. Step 3: Cross multiply
    1,115.55x = 1,673.55 × 934.20
  4. Step 4: Simplify right side
    1,115.55x = 1,563,430.41
  5. Step 5: Solve for x
    x = 1,563,430.41/1,115.55
  6. Step 6: Final answer
    x = 1,401.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.