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Finding the Fourth Proportional to 426,637.94, 640,052.34 and 160,400.76

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Solution

The fourth proportional to 426,637.94, 640,052.34 and 160,400.76 is: 240,637.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,637.94 : 640,052.34 = 160,400.76 : x
  2. Step 2: Convert to fraction form
    426,637.94/640,052.34 = 160,400.76/x
  3. Step 3: Cross multiply
    426,637.94x = 640,052.34 × 160,400.76
  4. Step 4: Simplify right side
    426,637.94x = 102,664,881,775.78
  5. Step 5: Solve for x
    x = 102,664,881,775.78/426,637.94
  6. Step 6: Final answer
    x = 240,637.02

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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.