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Finding the Fourth Proportional to 478,280.99, 660,057.72 and 263,421

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Solution

The fourth proportional to 478,280.99, 660,057.72 and 263,421 is: 363,537.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,280.99 : 660,057.72 = 263,421 : x
  2. Step 2: Convert to fraction form
    478,280.99/660,057.72 = 263,421/x
  3. Step 3: Cross multiply
    478,280.99x = 660,057.72 × 263,421
  4. Step 4: Simplify right side
    478,280.99x = 173,873,064,660.12
  5. Step 5: Solve for x
    x = 173,873,064,660.12/478,280.99
  6. Step 6: Final answer
    x = 363,537.48

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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.