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Finding the Fourth Proportional to 1,111.95, 1,533.38 and 669.89

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Solution

The fourth proportional to 1,111.95, 1,533.38 and 669.89 is: 923.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,111.95 : 1,533.38 = 669.89 : x
  2. Step 2: Convert to fraction form
    1,111.95/1,533.38 = 669.89/x
  3. Step 3: Cross multiply
    1,111.95x = 1,533.38 × 669.89
  4. Step 4: Simplify right side
    1,111.95x = 1,027,184.91
  5. Step 5: Solve for x
    x = 1,027,184.91/1,111.95
  6. Step 6: Final answer
    x = 923.77

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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.