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Finding the Fourth Proportional to 724,391.74, 999,705.81 and 418,480.98

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Solution

The fourth proportional to 724,391.74, 999,705.81 and 418,480.98 is: 577,529.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    724,391.74 : 999,705.81 = 418,480.98 : x
  2. Step 2: Convert to fraction form
    724,391.74/999,705.81 = 418,480.98/x
  3. Step 3: Cross multiply
    724,391.74x = 999,705.81 × 418,480.98
  4. Step 4: Simplify right side
    724,391.74x = 418,357,867,080.49
  5. Step 5: Solve for x
    x = 418,357,867,080.49/724,391.74
  6. Step 6: Final answer
    x = 577,529.87

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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.