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Finding the Fourth Proportional to 662,650.60, 992,804.70 and 640,724.20

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Solution

The fourth proportional to 662,650.60, 992,804.70 and 640,724.20 is: 959,953.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,650.60 : 992,804.70 = 640,724.20 : x
  2. Step 2: Convert to fraction form
    662,650.60/992,804.70 = 640,724.20/x
  3. Step 3: Cross multiply
    662,650.60x = 992,804.70 × 640,724.20
  4. Step 4: Simplify right side
    662,650.60x = 636,113,997,163.74
  5. Step 5: Solve for x
    x = 636,113,997,163.74/662,650.60
  6. Step 6: Final answer
    x = 959,953.85

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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.