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Finding the Fourth Proportional to 724,358.50, 999,626.47 and 397,701.63

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Solution

The fourth proportional to 724,358.50, 999,626.47 and 397,701.63 is: 548,834.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    724,358.50 : 999,626.47 = 397,701.63 : x
  2. Step 2: Convert to fraction form
    724,358.50/999,626.47 = 397,701.63/x
  3. Step 3: Cross multiply
    724,358.50x = 999,626.47 × 397,701.63
  4. Step 4: Simplify right side
    724,358.50x = 397,553,075,515.89
  5. Step 5: Solve for x
    x = 397,553,075,515.89/724,358.50
  6. Step 6: Final answer
    x = 548,834.70

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Double scale
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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.