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Finding the Fourth Proportional to 1,117.29, 1,674.48 and 623.68

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Solution

The fourth proportional to 1,117.29, 1,674.48 and 623.68 is: 934.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,117.29 : 1,674.48 = 623.68 : x
  2. Step 2: Convert to fraction form
    1,117.29/1,674.48 = 623.68/x
  3. Step 3: Cross multiply
    1,117.29x = 1,674.48 × 623.68
  4. Step 4: Simplify right side
    1,117.29x = 1,044,339.69
  5. Step 5: Solve for x
    x = 1,044,339.69/1,117.29
  6. Step 6: Final answer
    x = 934.71

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