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Finding the Fourth Proportional to 1,381.04, 2,071.26 and 559.08

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Solution

The fourth proportional to 1,381.04, 2,071.26 and 559.08 is: 838.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,381.04 : 2,071.26 = 559.08 : x
  2. Step 2: Convert to fraction form
    1,381.04/2,071.26 = 559.08/x
  3. Step 3: Cross multiply
    1,381.04x = 2,071.26 × 559.08
  4. Step 4: Simplify right side
    1,381.04x = 1,158,000.04
  5. Step 5: Solve for x
    x = 1,158,000.04/1,381.04
  6. Step 6: Final answer
    x = 838.50

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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.