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Finding the Fourth Proportional to 1,411, 2,115.62 and 717.30

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Solution

The fourth proportional to 1,411, 2,115.62 and 717.30 is: 1,075.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,411 : 2,115.62 = 717.30 : x
  2. Step 2: Convert to fraction form
    1,411/2,115.62 = 717.30/x
  3. Step 3: Cross multiply
    1,411x = 2,115.62 × 717.30
  4. Step 4: Simplify right side
    1,411x = 1,517,534.23
  5. Step 5: Solve for x
    x = 1,517,534.23/1,411
  6. Step 6: Final answer
    x = 1,075.50

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.