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Finding the Fourth Proportional to 1,028.55, 1,419.15 and 586.41

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Solution

The fourth proportional to 1,028.55, 1,419.15 and 586.41 is: 809.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,028.55 : 1,419.15 = 586.41 : x
  2. Step 2: Convert to fraction form
    1,028.55/1,419.15 = 586.41/x
  3. Step 3: Cross multiply
    1,028.55x = 1,419.15 × 586.41
  4. Step 4: Simplify right side
    1,028.55x = 832,203.75
  5. Step 5: Solve for x
    x = 832,203.75/1,028.55
  6. Step 6: Final answer
    x = 809.10

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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.