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Finding the Fourth Proportional to 339,118.80, 508,736.52 and 139,547.76

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Solution

The fourth proportional to 339,118.80, 508,736.52 and 139,547.76 is: 209,345.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,118.80 : 508,736.52 = 139,547.76 : x
  2. Step 2: Convert to fraction form
    339,118.80/508,736.52 = 139,547.76/x
  3. Step 3: Cross multiply
    339,118.80x = 508,736.52 × 139,547.76
  4. Step 4: Simplify right side
    339,118.80x = 70,993,041,796.20
  5. Step 5: Solve for x
    x = 70,993,041,796.20/339,118.80
  6. Step 6: Final answer
    x = 209,345.64

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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.