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Finding the Fourth Proportional to 985.61, 1,360.14 and 543.51

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Solution

The fourth proportional to 985.61, 1,360.14 and 543.51 is: 750.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    985.61 : 1,360.14 = 543.51 : x
  2. Step 2: Convert to fraction form
    985.61/1,360.14 = 543.51/x
  3. Step 3: Cross multiply
    985.61x = 1,360.14 × 543.51
  4. Step 4: Simplify right side
    985.61x = 739,240.17
  5. Step 5: Solve for x
    x = 739,240.17/985.61
  6. Step 6: Final answer
    x = 750.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.