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Finding the Fourth Proportional to 659,725.32, 989,451.90 and 322,419.72

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Solution

The fourth proportional to 659,725.32, 989,451.90 and 322,419.72 is: 483,563.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,725.32 : 989,451.90 = 322,419.72 : x
  2. Step 2: Convert to fraction form
    659,725.32/989,451.90 = 322,419.72/x
  3. Step 3: Cross multiply
    659,725.32x = 989,451.90 × 322,419.72
  4. Step 4: Simplify right side
    659,725.32x = 319,018,804,551.47
  5. Step 5: Solve for x
    x = 319,018,804,551.47/659,725.32
  6. Step 6: Final answer
    x = 483,563.08

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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.