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Finding the Fourth Proportional to 695,580.64, 959,937.24 and 389,639.20

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Solution

The fourth proportional to 695,580.64, 959,937.24 and 389,639.20 is: 537,722.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    695,580.64 : 959,937.24 = 389,639.20 : x
  2. Step 2: Convert to fraction form
    695,580.64/959,937.24 = 389,639.20/x
  3. Step 3: Cross multiply
    695,580.64x = 959,937.24 × 389,639.20
  4. Step 4: Simplify right side
    695,580.64x = 374,029,178,243.81
  5. Step 5: Solve for x
    x = 374,029,178,243.81/695,580.64
  6. Step 6: Final answer
    x = 537,722.24

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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.