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Finding the Fourth Proportional to 551,665.58, 761,322.02 and 309,948.62

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Solution

The fourth proportional to 551,665.58, 761,322.02 and 309,948.62 is: 427,742.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,665.58 : 761,322.02 = 309,948.62 : x
  2. Step 2: Convert to fraction form
    551,665.58/761,322.02 = 309,948.62/x
  3. Step 3: Cross multiply
    551,665.58x = 761,322.02 × 309,948.62
  4. Step 4: Simplify right side
    551,665.58x = 235,970,712,152.79
  5. Step 5: Solve for x
    x = 235,970,712,152.79/551,665.58
  6. Step 6: Final answer
    x = 427,742.31

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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.