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Finding the Fourth Proportional to 476,979.88, 715,518.96 and 140,019.22

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Solution

The fourth proportional to 476,979.88, 715,518.96 and 140,019.22 is: 210,043.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    476,979.88 : 715,518.96 = 140,019.22 : x
  2. Step 2: Convert to fraction form
    476,979.88/715,518.96 = 140,019.22/x
  3. Step 3: Cross multiply
    476,979.88x = 715,518.96 × 140,019.22
  4. Step 4: Simplify right side
    476,979.88x = 100,186,406,674.41
  5. Step 5: Solve for x
    x = 100,186,406,674.41/476,979.88
  6. Step 6: Final answer
    x = 210,043.26

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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.