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Finding the Fourth Proportional to 639,854.40, 883,051.29 and 368,010.30

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Solution

The fourth proportional to 639,854.40, 883,051.29 and 368,010.30 is: 507,884.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,854.40 : 883,051.29 = 368,010.30 : x
  2. Step 2: Convert to fraction form
    639,854.40/883,051.29 = 368,010.30/x
  3. Step 3: Cross multiply
    639,854.40x = 883,051.29 × 368,010.30
  4. Step 4: Simplify right side
    639,854.40x = 324,971,970,148.29
  5. Step 5: Solve for x
    x = 324,971,970,148.29/639,854.40
  6. Step 6: Final answer
    x = 507,884.25

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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.