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Finding the Fourth Proportional to 624,681.20, 935,709.60 and 343,870.40

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Solution

The fourth proportional to 624,681.20, 935,709.60 and 343,870.40 is: 515,083.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,681.20 : 935,709.60 = 343,870.40 : x
  2. Step 2: Convert to fraction form
    624,681.20/935,709.60 = 343,870.40/x
  3. Step 3: Cross multiply
    624,681.20x = 935,709.60 × 343,870.40
  4. Step 4: Simplify right side
    624,681.20x = 321,762,834,435.84
  5. Step 5: Solve for x
    x = 321,762,834,435.84/624,681.20
  6. Step 6: Final answer
    x = 515,083.27

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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.