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Finding the Fourth Proportional to 551,563.88, 761,117.16 and 309,886.68

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Solution

The fourth proportional to 551,563.88, 761,117.16 and 309,886.68 is: 427,620.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,563.88 : 761,117.16 = 309,886.68 : x
  2. Step 2: Convert to fraction form
    551,563.88/761,117.16 = 309,886.68/x
  3. Step 3: Cross multiply
    551,563.88x = 761,117.16 × 309,886.68
  4. Step 4: Simplify right side
    551,563.88x = 235,860,069,803.43
  5. Step 5: Solve for x
    x = 235,860,069,803.43/551,563.88
  6. Step 6: Final answer
    x = 427,620.59

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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.