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Finding the Fourth Proportional to 858.51, 1,184.27 and 543.18

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Solution

The fourth proportional to 858.51, 1,184.27 and 543.18 is: 749.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    858.51 : 1,184.27 = 543.18 : x
  2. Step 2: Convert to fraction form
    858.51/1,184.27 = 543.18/x
  3. Step 3: Cross multiply
    858.51x = 1,184.27 × 543.18
  4. Step 4: Simplify right side
    858.51x = 643,271.78
  5. Step 5: Solve for x
    x = 643,271.78/858.51
  6. Step 6: Final answer
    x = 749.29

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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.