Home / 319,198,397.70-440,493,589.80-172,520,681.70

Finding the Fourth Proportional to 319,198,397.70, 440,493,589.80 and 172,520,681.70

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Solution

The fourth proportional to 319,198,397.70, 440,493,589.80 and 172,520,681.70 is: 238,078,433.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,198,397.70 : 440,493,589.80 = 172,520,681.70 : x
  2. Step 2: Convert to fraction form
    319,198,397.70/440,493,589.80 = 172,520,681.70/x
  3. Step 3: Cross multiply
    319,198,397.70x = 440,493,589.80 × 172,520,681.70
  4. Step 4: Simplify right side
    319,198,397.70x = 75,994,254,396,776,160
  5. Step 5: Solve for x
    x = 75,994,254,396,776,160/319,198,397.70
  6. Step 6: Final answer
    x = 238,078,433.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.