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Finding the Fourth Proportional to 638,670.30, 956,920.98 and 385,418.64

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Solution

The fourth proportional to 638,670.30, 956,920.98 and 385,418.64 is: 577,473.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,670.30 : 956,920.98 = 385,418.64 : x
  2. Step 2: Convert to fraction form
    638,670.30/956,920.98 = 385,418.64/x
  3. Step 3: Cross multiply
    638,670.30x = 956,920.98 × 385,418.64
  4. Step 4: Simplify right side
    638,670.30x = 368,815,182,699.07
  5. Step 5: Solve for x
    x = 368,815,182,699.07/638,670.30
  6. Step 6: Final answer
    x = 577,473.51

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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.