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Finding the Fourth Proportional to 605,647.80, 907,487.55 and 521,010.90

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Solution

The fourth proportional to 605,647.80, 907,487.55 and 521,010.90 is: 780,669.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,647.80 : 907,487.55 = 521,010.90 : x
  2. Step 2: Convert to fraction form
    605,647.80/907,487.55 = 521,010.90/x
  3. Step 3: Cross multiply
    605,647.80x = 907,487.55 × 521,010.90
  4. Step 4: Simplify right side
    605,647.80x = 472,810,905,164.30
  5. Step 5: Solve for x
    x = 472,810,905,164.30/605,647.80
  6. Step 6: Final answer
    x = 780,669.73

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1.5x scale

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.