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Finding the Fourth Proportional to 723,655.28, 997,990.80 and 451,748.40

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Solution

The fourth proportional to 723,655.28, 997,990.80 and 451,748.40 is: 623,004.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    723,655.28 : 997,990.80 = 451,748.40 : x
  2. Step 2: Convert to fraction form
    723,655.28/997,990.80 = 451,748.40/x
  3. Step 3: Cross multiply
    723,655.28x = 997,990.80 × 451,748.40
  4. Step 4: Simplify right side
    723,655.28x = 450,840,744,855.98
  5. Step 5: Solve for x
    x = 450,840,744,855.98/723,655.28
  6. Step 6: Final answer
    x = 623,004.85

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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.