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Finding the Fourth Proportional to 583,428.80, 875,143.20 and 443,460.80

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Solution

The fourth proportional to 583,428.80, 875,143.20 and 443,460.80 is: 665,191.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    583,428.80 : 875,143.20 = 443,460.80 : x
  2. Step 2: Convert to fraction form
    583,428.80/875,143.20 = 443,460.80/x
  3. Step 3: Cross multiply
    583,428.80x = 875,143.20 × 443,460.80
  4. Step 4: Simplify right side
    583,428.80x = 388,091,703,586.56
  5. Step 5: Solve for x
    x = 388,091,703,586.56/583,428.80
  6. Step 6: Final answer
    x = 665,191.20

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.