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Finding the Fourth Proportional to 617,903.90, 926,855.85 and 551,419.10

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Solution

The fourth proportional to 617,903.90, 926,855.85 and 551,419.10 is: 827,128.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,903.90 : 926,855.85 = 551,419.10 : x
  2. Step 2: Convert to fraction form
    617,903.90/926,855.85 = 551,419.10/x
  3. Step 3: Cross multiply
    617,903.90x = 926,855.85 × 551,419.10
  4. Step 4: Simplify right side
    617,903.90x = 511,086,018,636.74
  5. Step 5: Solve for x
    x = 511,086,018,636.74/617,903.90
  6. Step 6: Final answer
    x = 827,128.65

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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.