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Finding the Fourth Proportional to 1,047.95, 1,445.58 and 669.12

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Solution

The fourth proportional to 1,047.95, 1,445.58 and 669.12 is: 923.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,047.95 : 1,445.58 = 669.12 : x
  2. Step 2: Convert to fraction form
    1,047.95/1,445.58 = 669.12/x
  3. Step 3: Cross multiply
    1,047.95x = 1,445.58 × 669.12
  4. Step 4: Simplify right side
    1,047.95x = 967,266.49
  5. Step 5: Solve for x
    x = 967,266.49/1,047.95
  6. Step 6: Final answer
    x = 923.01

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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.