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Finding the Fourth Proportional to 572,057.76, 789,439.84 and 317,410.76

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Solution

The fourth proportional to 572,057.76, 789,439.84 and 317,410.76 is: 438,026.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,057.76 : 789,439.84 = 317,410.76 : x
  2. Step 2: Convert to fraction form
    572,057.76/789,439.84 = 317,410.76/x
  3. Step 3: Cross multiply
    572,057.76x = 789,439.84 × 317,410.76
  4. Step 4: Simplify right side
    572,057.76x = 250,576,699,588.68
  5. Step 5: Solve for x
    x = 250,576,699,588.68/572,057.76
  6. Step 6: Final answer
    x = 438,026.92

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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.