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Finding the Fourth Proportional to 528,079.20, 792,118.80 and 318,127.20

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Solution

The fourth proportional to 528,079.20, 792,118.80 and 318,127.20 is: 477,190.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,079.20 : 792,118.80 = 318,127.20 : x
  2. Step 2: Convert to fraction form
    528,079.20/792,118.80 = 318,127.20/x
  3. Step 3: Cross multiply
    528,079.20x = 792,118.80 × 318,127.20
  4. Step 4: Simplify right side
    528,079.20x = 251,994,535,911.36
  5. Step 5: Solve for x
    x = 251,994,535,911.36/528,079.20
  6. Step 6: Final answer
    x = 477,190.80

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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.