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Finding the Fourth Proportional to 524,991.72, 724,543 and 321,178.40

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Solution

The fourth proportional to 524,991.72, 724,543 and 321,178.40 is: 443,259.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    524,991.72 : 724,543 = 321,178.40 : x
  2. Step 2: Convert to fraction form
    524,991.72/724,543 = 321,178.40/x
  3. Step 3: Cross multiply
    524,991.72x = 724,543 × 321,178.40
  4. Step 4: Simplify right side
    524,991.72x = 232,707,561,471.20
  5. Step 5: Solve for x
    x = 232,707,561,471.20/524,991.72
  6. Step 6: Final answer
    x = 443,259.49

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1.5x scale

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.