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Finding the Fourth Proportional to 675,848.40, 932,670.90 and 421,200.60

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Solution

The fourth proportional to 675,848.40, 932,670.90 and 421,200.60 is: 581,256.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    675,848.40 : 932,670.90 = 421,200.60 : x
  2. Step 2: Convert to fraction form
    675,848.40/932,670.90 = 421,200.60/x
  3. Step 3: Cross multiply
    675,848.40x = 932,670.90 × 421,200.60
  4. Step 4: Simplify right side
    675,848.40x = 392,841,542,682.54
  5. Step 5: Solve for x
    x = 392,841,542,682.54/675,848.40
  6. Step 6: Final answer
    x = 581,256.90

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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.