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Finding the Fourth Proportional to 723,172.35, 997,910.79 and 400,855.03

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Solution

The fourth proportional to 723,172.35, 997,910.79 and 400,855.03 is: 553,142.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    723,172.35 : 997,910.79 = 400,855.03 : x
  2. Step 2: Convert to fraction form
    723,172.35/997,910.79 = 400,855.03/x
  3. Step 3: Cross multiply
    723,172.35x = 997,910.79 × 400,855.03
  4. Step 4: Simplify right side
    723,172.35x = 400,017,555,664.79
  5. Step 5: Solve for x
    x = 400,017,555,664.79/723,172.35
  6. Step 6: Final answer
    x = 553,142.77

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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.