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Finding the Fourth Proportional to 638,420.60, 880,997.92 and 348,026.22

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Solution

The fourth proportional to 638,420.60, 880,997.92 and 348,026.22 is: 480,263.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,420.60 : 880,997.92 = 348,026.22 : x
  2. Step 2: Convert to fraction form
    638,420.60/880,997.92 = 348,026.22/x
  3. Step 3: Cross multiply
    638,420.60x = 880,997.92 × 348,026.22
  4. Step 4: Simplify right side
    638,420.60x = 306,610,375,055.40
  5. Step 5: Solve for x
    x = 306,610,375,055.40/638,420.60
  6. Step 6: Final answer
    x = 480,263.91

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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.