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Finding the Fourth Proportional to 473,205.80, 709,808.70 and 140,781.80

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Solution

The fourth proportional to 473,205.80, 709,808.70 and 140,781.80 is: 211,172.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    473,205.80 : 709,808.70 = 140,781.80 : x
  2. Step 2: Convert to fraction form
    473,205.80/709,808.70 = 140,781.80/x
  3. Step 3: Cross multiply
    473,205.80x = 709,808.70 × 140,781.80
  4. Step 4: Simplify right side
    473,205.80x = 99,928,146,441.66
  5. Step 5: Solve for x
    x = 99,928,146,441.66/473,205.80
  6. Step 6: Final answer
    x = 211,172.70

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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.