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Finding the Fourth Proportional to 659,327.40, 988,991.10 and 612,088.20

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Solution

The fourth proportional to 659,327.40, 988,991.10 and 612,088.20 is: 918,132.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,327.40 : 988,991.10 = 612,088.20 : x
  2. Step 2: Convert to fraction form
    659,327.40/988,991.10 = 612,088.20/x
  3. Step 3: Cross multiply
    659,327.40x = 988,991.10 × 612,088.20
  4. Step 4: Simplify right side
    659,327.40x = 605,349,782,215.02
  5. Step 5: Solve for x
    x = 605,349,782,215.02/659,327.40
  6. Step 6: Final answer
    x = 918,132.30

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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.