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Finding the Fourth Proportional to 869,348.88, 1,199,759.04 and 487,400.40

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Solution

The fourth proportional to 869,348.88, 1,199,759.04 and 487,400.40 is: 672,644.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,348.88 : 1,199,759.04 = 487,400.40 : x
  2. Step 2: Convert to fraction form
    869,348.88/1,199,759.04 = 487,400.40/x
  3. Step 3: Cross multiply
    869,348.88x = 1,199,759.04 × 487,400.40
  4. Step 4: Simplify right side
    869,348.88x = 584,763,035,999.62
  5. Step 5: Solve for x
    x = 584,763,035,999.62/869,348.88
  6. Step 6: Final answer
    x = 672,644.84

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Double scale
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1.5x scale

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.