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Finding the Fourth Proportional to 1,407.83, 2,112.01 and 713.93

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Solution

The fourth proportional to 1,407.83, 2,112.01 and 713.93 is: 1,071.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,407.83 : 2,112.01 = 713.93 : x
  2. Step 2: Convert to fraction form
    1,407.83/2,112.01 = 713.93/x
  3. Step 3: Cross multiply
    1,407.83x = 2,112.01 × 713.93
  4. Step 4: Simplify right side
    1,407.83x = 1,507,814.95
  5. Step 5: Solve for x
    x = 1,507,814.95/1,407.83
  6. Step 6: Final answer
    x = 1,071.02

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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.