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Finding the Fourth Proportional to 622,307.60, 931,128.60 and 412,355.60

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Solution

The fourth proportional to 622,307.60, 931,128.60 and 412,355.60 is: 616,987.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    622,307.60 : 931,128.60 = 412,355.60 : x
  2. Step 2: Convert to fraction form
    622,307.60/931,128.60 = 412,355.60/x
  3. Step 3: Cross multiply
    622,307.60x = 931,128.60 × 412,355.60
  4. Step 4: Simplify right side
    622,307.60x = 383,956,092,530.16
  5. Step 5: Solve for x
    x = 383,956,092,530.16/622,307.60
  6. Step 6: Final answer
    x = 616,987.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.