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Finding the Fourth Proportional to 991,938.10, 1,369,023.96 and 604,978

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Solution

The fourth proportional to 991,938.10, 1,369,023.96 and 604,978 is: 834,960.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,938.10 : 1,369,023.96 = 604,978 : x
  2. Step 2: Convert to fraction form
    991,938.10/1,369,023.96 = 604,978/x
  3. Step 3: Cross multiply
    991,938.10x = 1,369,023.96 × 604,978
  4. Step 4: Simplify right side
    991,938.10x = 828,229,377,272.88
  5. Step 5: Solve for x
    x = 828,229,377,272.88/991,938.10
  6. Step 6: Final answer
    x = 834,960.75

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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.