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Finding the Fourth Proportional to 1,367,923.05, 1,887,741.21 and 747,729.06

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Solution

The fourth proportional to 1,367,923.05, 1,887,741.21 and 747,729.06 is: 1,031,870.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,367,923.05 : 1,887,741.21 = 747,729.06 : x
  2. Step 2: Convert to fraction form
    1,367,923.05/1,887,741.21 = 747,729.06/x
  3. Step 3: Cross multiply
    1,367,923.05x = 1,887,741.21 × 747,729.06
  4. Step 4: Simplify right side
    1,367,923.05x = 1,411,518,970,532.70
  5. Step 5: Solve for x
    x = 1,411,518,970,532.70/1,367,923.05
  6. Step 6: Final answer
    x = 1,031,870.15

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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.