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Finding the Fourth Proportional to 697,505.90, 962,525.36 and 387,428.60

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Solution

The fourth proportional to 697,505.90, 962,525.36 and 387,428.60 is: 534,633.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    697,505.90 : 962,525.36 = 387,428.60 : x
  2. Step 2: Convert to fraction form
    697,505.90/962,525.36 = 387,428.60/x
  3. Step 3: Cross multiply
    697,505.90x = 962,525.36 × 387,428.60
  4. Step 4: Simplify right side
    697,505.90x = 372,909,856,064.18
  5. Step 5: Solve for x
    x = 372,909,856,064.18/697,505.90
  6. Step 6: Final answer
    x = 534,633.27

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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.