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Finding the Fourth Proportional to 319,378.17, 479,048.35 and 119,681.85

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Solution

The fourth proportional to 319,378.17, 479,048.35 and 119,681.85 is: 179,515.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,378.17 : 479,048.35 = 119,681.85 : x
  2. Step 2: Convert to fraction form
    319,378.17/479,048.35 = 119,681.85/x
  3. Step 3: Cross multiply
    319,378.17x = 479,048.35 × 119,681.85
  4. Step 4: Simplify right side
    319,378.17x = 57,333,392,767.45
  5. Step 5: Solve for x
    x = 57,333,392,767.45/319,378.17
  6. Step 6: Final answer
    x = 179,515.69

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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.