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Finding the Fourth Proportional to 554,487.72, 831,783.96 and 155,128.56

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Solution

The fourth proportional to 554,487.72, 831,783.96 and 155,128.56 is: 232,707.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,487.72 : 831,783.96 = 155,128.56 : x
  2. Step 2: Convert to fraction form
    554,487.72/831,783.96 = 155,128.56/x
  3. Step 3: Cross multiply
    554,487.72x = 831,783.96 × 155,128.56
  4. Step 4: Simplify right side
    554,487.72x = 129,033,447,945.90
  5. Step 5: Solve for x
    x = 129,033,447,945.90/554,487.72
  6. Step 6: Final answer
    x = 232,707.49

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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.