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Finding the Fourth Proportional to 990,885.16, 1,367,375.70 and 561,168.37

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Solution

The fourth proportional to 990,885.16, 1,367,375.70 and 561,168.37 is: 774,386.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,885.16 : 1,367,375.70 = 561,168.37 : x
  2. Step 2: Convert to fraction form
    990,885.16/1,367,375.70 = 561,168.37/x
  3. Step 3: Cross multiply
    990,885.16x = 1,367,375.70 × 561,168.37
  4. Step 4: Simplify right side
    990,885.16x = 767,327,992,746.61
  5. Step 5: Solve for x
    x = 767,327,992,746.61/990,885.16
  6. Step 6: Final answer
    x = 774,386.40

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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.