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Finding the Fourth Proportional to 478,786.56, 660,730 and 263,934.48

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Solution

The fourth proportional to 478,786.56, 660,730 and 263,934.48 is: 364,232.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,786.56 : 660,730 = 263,934.48 : x
  2. Step 2: Convert to fraction form
    478,786.56/660,730 = 263,934.48/x
  3. Step 3: Cross multiply
    478,786.56x = 660,730 × 263,934.48
  4. Step 4: Simplify right side
    478,786.56x = 174,389,428,970.40
  5. Step 5: Solve for x
    x = 174,389,428,970.40/478,786.56
  6. Step 6: Final answer
    x = 364,232.09

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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.