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Finding the Fourth Proportional to 628,704.13, 943,056.50 and 207,980.01

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Solution

The fourth proportional to 628,704.13, 943,056.50 and 207,980.01 is: 311,970.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,704.13 : 943,056.50 = 207,980.01 : x
  2. Step 2: Convert to fraction form
    628,704.13/943,056.50 = 207,980.01/x
  3. Step 3: Cross multiply
    628,704.13x = 943,056.50 × 207,980.01
  4. Step 4: Simplify right side
    628,704.13x = 196,136,900,300.57
  5. Step 5: Solve for x
    x = 196,136,900,300.57/628,704.13
  6. Step 6: Final answer
    x = 311,970.12

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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.