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Finding the Fourth Proportional to 521,664.90, 731,905.50 and 521,664.90

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Solution

The fourth proportional to 521,664.90, 731,905.50 and 521,664.90 is: 731,905.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,664.90 : 731,905.50 = 521,664.90 : x
  2. Step 2: Convert to fraction form
    521,664.90/731,905.50 = 521,664.90/x
  3. Step 3: Cross multiply
    521,664.90x = 731,905.50 × 521,664.90
  4. Step 4: Simplify right side
    521,664.90x = 381,809,409,466.95
  5. Step 5: Solve for x
    x = 381,809,409,466.95/521,664.90
  6. Step 6: Final answer
    x = 731,905.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.