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Finding the Fourth Proportional to 622,665.70, 933,998.55 and 561,648.40

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Solution

The fourth proportional to 622,665.70, 933,998.55 and 561,648.40 is: 842,472.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    622,665.70 : 933,998.55 = 561,648.40 : x
  2. Step 2: Convert to fraction form
    622,665.70/933,998.55 = 561,648.40/x
  3. Step 3: Cross multiply
    622,665.70x = 933,998.55 × 561,648.40
  4. Step 4: Simplify right side
    622,665.70x = 524,578,791,209.82
  5. Step 5: Solve for x
    x = 524,578,791,209.82/622,665.70
  6. Step 6: Final answer
    x = 842,472.60

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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.