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Finding the Fourth Proportional to 659,726.32, 989,453.40 and 322,420.72

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Solution

The fourth proportional to 659,726.32, 989,453.40 and 322,420.72 is: 483,564.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,726.32 : 989,453.40 = 322,420.72 : x
  2. Step 2: Convert to fraction form
    659,726.32/989,453.40 = 322,420.72/x
  3. Step 3: Cross multiply
    659,726.32x = 989,453.40 × 322,420.72
  4. Step 4: Simplify right side
    659,726.32x = 319,020,277,634.45
  5. Step 5: Solve for x
    x = 319,020,277,634.45/659,726.32
  6. Step 6: Final answer
    x = 483,564.58

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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.