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Finding the Fourth Proportional to 631,779, 871,853.40 and 345,301.04

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Solution

The fourth proportional to 631,779, 871,853.40 and 345,301.04 is: 476,514.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,779 : 871,853.40 = 345,301.04 : x
  2. Step 2: Convert to fraction form
    631,779/871,853.40 = 345,301.04/x
  3. Step 3: Cross multiply
    631,779x = 871,853.40 × 345,301.04
  4. Step 4: Simplify right side
    631,779x = 301,051,881,388.27
  5. Step 5: Solve for x
    x = 301,051,881,388.27/631,779
  6. Step 6: Final answer
    x = 476,514.54

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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.