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Finding the Fourth Proportional to 858.15, 1,184.24 and 465.18

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Solution

The fourth proportional to 858.15, 1,184.24 and 465.18 is: 641.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    858.15 : 1,184.24 = 465.18 : x
  2. Step 2: Convert to fraction form
    858.15/1,184.24 = 465.18/x
  3. Step 3: Cross multiply
    858.15x = 1,184.24 × 465.18
  4. Step 4: Simplify right side
    858.15x = 550,884.76
  5. Step 5: Solve for x
    x = 550,884.76/858.15
  6. Step 6: Final answer
    x = 641.94

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1.5x scale

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.