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Finding the Fourth Proportional to 528,052.80, 792,079.20 and 386,335.20

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Solution

The fourth proportional to 528,052.80, 792,079.20 and 386,335.20 is: 579,502.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,052.80 : 792,079.20 = 386,335.20 : x
  2. Step 2: Convert to fraction form
    528,052.80/792,079.20 = 386,335.20/x
  3. Step 3: Cross multiply
    528,052.80x = 792,079.20 × 386,335.20
  4. Step 4: Simplify right side
    528,052.80x = 306,008,076,147.84
  5. Step 5: Solve for x
    x = 306,008,076,147.84/528,052.80
  6. Step 6: Final answer
    x = 579,502.80

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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.