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Finding the Fourth Proportional to 634,048.28, 875,076.14 and 392,408.60

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Solution

The fourth proportional to 634,048.28, 875,076.14 and 392,408.60 is: 541,579.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    634,048.28 : 875,076.14 = 392,408.60 : x
  2. Step 2: Convert to fraction form
    634,048.28/875,076.14 = 392,408.60/x
  3. Step 3: Cross multiply
    634,048.28x = 875,076.14 × 392,408.60
  4. Step 4: Simplify right side
    634,048.28x = 343,387,402,990.80
  5. Step 5: Solve for x
    x = 343,387,402,990.80/634,048.28
  6. Step 6: Final answer
    x = 541,579.27

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1.5x scale

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.