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Finding the Fourth Proportional to 869,353.88, 1,199,765.94 and 487,405.40

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Solution

The fourth proportional to 869,353.88, 1,199,765.94 and 487,405.40 is: 672,651.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,353.88 : 1,199,765.94 = 487,405.40 : x
  2. Step 2: Convert to fraction form
    869,353.88/1,199,765.94 = 487,405.40/x
  3. Step 3: Cross multiply
    869,353.88x = 1,199,765.94 × 487,405.40
  4. Step 4: Simplify right side
    869,353.88x = 584,772,397,892.08
  5. Step 5: Solve for x
    x = 584,772,397,892.08/869,353.88
  6. Step 6: Final answer
    x = 672,651.74

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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.