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Finding the Fourth Proportional to 601,830.30, 831,087.63 and 387,343.92

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Solution

The fourth proportional to 601,830.30, 831,087.63 and 387,343.92 is: 534,896.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    601,830.30 : 831,087.63 = 387,343.92 : x
  2. Step 2: Convert to fraction form
    601,830.30/831,087.63 = 387,343.92/x
  3. Step 3: Cross multiply
    601,830.30x = 831,087.63 × 387,343.92
  4. Step 4: Simplify right side
    601,830.30x = 321,916,740,467.71
  5. Step 5: Solve for x
    x = 321,916,740,467.71/601,830.30
  6. Step 6: Final answer
    x = 534,896.20

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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.