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Finding the Fourth Proportional to 1,133.30, 1,562.73 and 870.74

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Solution

The fourth proportional to 1,133.30, 1,562.73 and 870.74 is: 1,200.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,133.30 : 1,562.73 = 870.74 : x
  2. Step 2: Convert to fraction form
    1,133.30/1,562.73 = 870.74/x
  3. Step 3: Cross multiply
    1,133.30x = 1,562.73 × 870.74
  4. Step 4: Simplify right side
    1,133.30x = 1,360,731.52
  5. Step 5: Solve for x
    x = 1,360,731.52/1,133.30
  6. Step 6: Final answer
    x = 1,200.68

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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.