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Finding the Fourth Proportional to 660,488.60, 911,474.16 and 374,008.61

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Solution

The fourth proportional to 660,488.60, 911,474.16 and 374,008.61 is: 516,131.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,488.60 : 911,474.16 = 374,008.61 : x
  2. Step 2: Convert to fraction form
    660,488.60/911,474.16 = 374,008.61/x
  3. Step 3: Cross multiply
    660,488.60x = 911,474.16 × 374,008.61
  4. Step 4: Simplify right side
    660,488.60x = 340,899,179,075.15
  5. Step 5: Solve for x
    x = 340,899,179,075.15/660,488.60
  6. Step 6: Final answer
    x = 516,131.82

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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.