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Finding the Fourth Proportional to 1,316.07, 1,974.33 and 657.99

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Solution

The fourth proportional to 1,316.07, 1,974.33 and 657.99 is: 987.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.07 : 1,974.33 = 657.99 : x
  2. Step 2: Convert to fraction form
    1,316.07/1,974.33 = 657.99/x
  3. Step 3: Cross multiply
    1,316.07x = 1,974.33 × 657.99
  4. Step 4: Simplify right side
    1,316.07x = 1,299,089.40
  5. Step 5: Solve for x
    x = 1,299,089.40/1,316.07
  6. Step 6: Final answer
    x = 987.10

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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.