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Finding the Fourth Proportional to 426,753.16, 640,162.42 and 127,210.84

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Solution

The fourth proportional to 426,753.16, 640,162.42 and 127,210.84 is: 190,826.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,753.16 : 640,162.42 = 127,210.84 : x
  2. Step 2: Convert to fraction form
    426,753.16/640,162.42 = 127,210.84/x
  3. Step 3: Cross multiply
    426,753.16x = 640,162.42 × 127,210.84
  4. Step 4: Simplify right side
    426,753.16x = 81,435,599,184.63
  5. Step 5: Solve for x
    x = 81,435,599,184.63/426,753.16
  6. Step 6: Final answer
    x = 190,826.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.