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Finding the Fourth Proportional to 723,401.42, 997,583.99 and 666,189.50

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Solution

The fourth proportional to 723,401.42, 997,583.99 and 666,189.50 is: 918,687.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    723,401.42 : 997,583.99 = 666,189.50 : x
  2. Step 2: Convert to fraction form
    723,401.42/997,583.99 = 666,189.50/x
  3. Step 3: Cross multiply
    723,401.42x = 997,583.99 × 666,189.50
  4. Step 4: Simplify right side
    723,401.42x = 664,579,971,187.24
  5. Step 5: Solve for x
    x = 664,579,971,187.24/723,401.42
  6. Step 6: Final answer
    x = 918,687.68

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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.