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Finding the Fourth Proportional to 922.99, 1,374.59 and 917.73

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Solution

The fourth proportional to 922.99, 1,374.59 and 917.73 is: 1,366.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    922.99 : 1,374.59 = 917.73 : x
  2. Step 2: Convert to fraction form
    922.99/1,374.59 = 917.73/x
  3. Step 3: Cross multiply
    922.99x = 1,374.59 × 917.73
  4. Step 4: Simplify right side
    922.99x = 1,261,502.48
  5. Step 5: Solve for x
    x = 1,261,502.48/922.99
  6. Step 6: Final answer
    x = 1,366.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.