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Finding the Fourth Proportional to 660,868.40, 911,987.16 and 359,060.24

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Solution

The fourth proportional to 660,868.40, 911,987.16 and 359,060.24 is: 495,497.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,868.40 : 911,987.16 = 359,060.24 : x
  2. Step 2: Convert to fraction form
    660,868.40/911,987.16 = 359,060.24/x
  3. Step 3: Cross multiply
    660,868.40x = 911,987.16 × 359,060.24
  4. Step 4: Simplify right side
    660,868.40x = 327,458,328,546.52
  5. Step 5: Solve for x
    x = 327,458,328,546.52/660,868.40
  6. Step 6: Final answer
    x = 495,497.03

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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.