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Finding the Fourth Proportional to 551,917, 761,646.18 and 313,453

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Solution

The fourth proportional to 551,917, 761,646.18 and 313,453 is: 432,565.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,917 : 761,646.18 = 313,453 : x
  2. Step 2: Convert to fraction form
    551,917/761,646.18 = 313,453/x
  3. Step 3: Cross multiply
    551,917x = 761,646.18 × 313,453
  4. Step 4: Simplify right side
    551,917x = 238,740,280,059.54
  5. Step 5: Solve for x
    x = 238,740,280,059.54/551,917
  6. Step 6: Final answer
    x = 432,565.55

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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.