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Finding the Fourth Proportional to 1,113.79, 1,670.73 and 497.38

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Solution

The fourth proportional to 1,113.79, 1,670.73 and 497.38 is: 746.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,113.79 : 1,670.73 = 497.38 : x
  2. Step 2: Convert to fraction form
    1,113.79/1,670.73 = 497.38/x
  3. Step 3: Cross multiply
    1,113.79x = 1,670.73 × 497.38
  4. Step 4: Simplify right side
    1,113.79x = 830,987.69
  5. Step 5: Solve for x
    x = 830,987.69/1,113.79
  6. Step 6: Final answer
    x = 746.09

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Why These Related Problems?

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