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Finding the Fourth Proportional to 622,657.20, 933,985.80 and 561,639.90

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Solution

The fourth proportional to 622,657.20, 933,985.80 and 561,639.90 is: 842,459.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    622,657.20 : 933,985.80 = 561,639.90 : x
  2. Step 2: Convert to fraction form
    622,657.20/933,985.80 = 561,639.90/x
  3. Step 3: Cross multiply
    622,657.20x = 933,985.80 × 561,639.90
  4. Step 4: Simplify right side
    622,657.20x = 524,563,691,313.42
  5. Step 5: Solve for x
    x = 524,563,691,313.42/622,657.20
  6. Step 6: Final answer
    x = 842,459.85

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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.