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Finding the Fourth Proportional to 418,985.04, 628,478.84 and 103,441.98

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Solution

The fourth proportional to 418,985.04, 628,478.84 and 103,441.98 is: 155,163.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,985.04 : 628,478.84 = 103,441.98 : x
  2. Step 2: Convert to fraction form
    418,985.04/628,478.84 = 103,441.98/x
  3. Step 3: Cross multiply
    418,985.04x = 628,478.84 × 103,441.98
  4. Step 4: Simplify right side
    418,985.04x = 65,011,095,597.70
  5. Step 5: Solve for x
    x = 65,011,095,597.70/418,985.04
  6. Step 6: Final answer
    x = 155,163.29

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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.