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Finding the Fourth Proportional to 860.01, 1,187.40 and 528.81

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Solution

The fourth proportional to 860.01, 1,187.40 and 528.81 is: 730.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    860.01 : 1,187.40 = 528.81 : x
  2. Step 2: Convert to fraction form
    860.01/1,187.40 = 528.81/x
  3. Step 3: Cross multiply
    860.01x = 1,187.40 × 528.81
  4. Step 4: Simplify right side
    860.01x = 627,908.99
  5. Step 5: Solve for x
    x = 627,908.99/860.01
  6. Step 6: Final answer
    x = 730.12

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Double scale
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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.