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Finding the Fourth Proportional to 551,638.64, 761,021.40 and 347,565.68

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Solution

The fourth proportional to 551,638.64, 761,021.40 and 347,565.68 is: 479,489.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,638.64 : 761,021.40 = 347,565.68 : x
  2. Step 2: Convert to fraction form
    551,638.64/761,021.40 = 347,565.68/x
  3. Step 3: Cross multiply
    551,638.64x = 761,021.40 × 347,565.68
  4. Step 4: Simplify right side
    551,638.64x = 264,504,920,385.55
  5. Step 5: Solve for x
    x = 264,504,920,385.55/551,638.64
  6. Step 6: Final answer
    x = 479,489.47

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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.