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Finding the Fourth Proportional to 638,291.40, 957,206.70 and 322,643.40

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Solution

The fourth proportional to 638,291.40, 957,206.70 and 322,643.40 is: 483,848.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,291.40 : 957,206.70 = 322,643.40 : x
  2. Step 2: Convert to fraction form
    638,291.40/957,206.70 = 322,643.40/x
  3. Step 3: Cross multiply
    638,291.40x = 957,206.70 × 322,643.40
  4. Step 4: Simplify right side
    638,291.40x = 308,836,424,190.78
  5. Step 5: Solve for x
    x = 308,836,424,190.78/638,291.40
  6. Step 6: Final answer
    x = 483,848.64

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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.