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Finding the Fourth Proportional to 985,374.78, 1,360,034.88 and 640,610.64

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Solution

The fourth proportional to 985,374.78, 1,360,034.88 and 640,610.64 is: 884,184.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    985,374.78 : 1,360,034.88 = 640,610.64 : x
  2. Step 2: Convert to fraction form
    985,374.78/1,360,034.88 = 640,610.64/x
  3. Step 3: Cross multiply
    985,374.78x = 1,360,034.88 × 640,610.64
  4. Step 4: Simplify right side
    985,374.78x = 871,252,814,899.12
  5. Step 5: Solve for x
    x = 871,252,814,899.12/985,374.78
  6. Step 6: Final answer
    x = 884,184.20

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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.