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Finding the Fourth Proportional to 648,272.24, 894,467 and 390,079.88

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Solution

The fourth proportional to 648,272.24, 894,467 and 390,079.88 is: 538,220.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,272.24 : 894,467 = 390,079.88 : x
  2. Step 2: Convert to fraction form
    648,272.24/894,467 = 390,079.88/x
  3. Step 3: Cross multiply
    648,272.24x = 894,467 × 390,079.88
  4. Step 4: Simplify right side
    648,272.24x = 348,913,580,023.96
  5. Step 5: Solve for x
    x = 348,913,580,023.96/648,272.24
  6. Step 6: Final answer
    x = 538,220.76

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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.