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Finding the Fourth Proportional to 418,988.04, 628,483.34 and 103,444.98

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Solution

The fourth proportional to 418,988.04, 628,483.34 and 103,444.98 is: 155,167.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,988.04 : 628,483.34 = 103,444.98 : x
  2. Step 2: Convert to fraction form
    418,988.04/628,483.34 = 103,444.98/x
  3. Step 3: Cross multiply
    418,988.04x = 628,483.34 × 103,444.98
  4. Step 4: Simplify right side
    418,988.04x = 65,013,446,536.63
  5. Step 5: Solve for x
    x = 65,013,446,536.63/418,988.04
  6. Step 6: Final answer
    x = 155,167.79

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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.