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Finding the Fourth Proportional to 638,127.90, 956,961.45 and 322,479.90

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Solution

The fourth proportional to 638,127.90, 956,961.45 and 322,479.90 is: 483,603.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,127.90 : 956,961.45 = 322,479.90 : x
  2. Step 2: Convert to fraction form
    638,127.90/956,961.45 = 322,479.90/x
  3. Step 3: Cross multiply
    638,127.90x = 956,961.45 × 322,479.90
  4. Step 4: Simplify right side
    638,127.90x = 308,600,832,699.86
  5. Step 5: Solve for x
    x = 308,600,832,699.86/638,127.90
  6. Step 6: Final answer
    x = 483,603.42

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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.