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Finding the Fourth Proportional to 551,813.54, 761,522.74 and 310,100.90

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Solution

The fourth proportional to 551,813.54, 761,522.74 and 310,100.90 is: 427,950.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,813.54 : 761,522.74 = 310,100.90 : x
  2. Step 2: Convert to fraction form
    551,813.54/761,522.74 = 310,100.90/x
  3. Step 3: Cross multiply
    551,813.54x = 761,522.74 × 310,100.90
  4. Step 4: Simplify right side
    551,813.54x = 236,148,887,044.47
  5. Step 5: Solve for x
    x = 236,148,887,044.47/551,813.54
  6. Step 6: Final answer
    x = 427,950.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.