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Finding the Fourth Proportional to 724,720.40, 1,085,768.40 and 619,744.40

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Solution

The fourth proportional to 724,720.40, 1,085,768.40 and 619,744.40 is: 928,494.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    724,720.40 : 1,085,768.40 = 619,744.40 : x
  2. Step 2: Convert to fraction form
    724,720.40/1,085,768.40 = 619,744.40/x
  3. Step 3: Cross multiply
    724,720.40x = 1,085,768.40 × 619,744.40
  4. Step 4: Simplify right side
    724,720.40x = 672,898,885,596.96
  5. Step 5: Solve for x
    x = 672,898,885,596.96/724,720.40
  6. Step 6: Final answer
    x = 928,494.47

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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.