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Finding the Fourth Proportional to 1,316.76, 1,975.42 and 547.26

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Solution

The fourth proportional to 1,316.76, 1,975.42 and 547.26 is: 821.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.76 : 1,975.42 = 547.26 : x
  2. Step 2: Convert to fraction form
    1,316.76/1,975.42 = 547.26/x
  3. Step 3: Cross multiply
    1,316.76x = 1,975.42 × 547.26
  4. Step 4: Simplify right side
    1,316.76x = 1,081,068.35
  5. Step 5: Solve for x
    x = 1,081,068.35/1,316.76
  6. Step 6: Final answer
    x = 821.01

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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.