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Finding the Fourth Proportional to 520,074.40, 780,111.60 and 415,098.40

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Solution

The fourth proportional to 520,074.40, 780,111.60 and 415,098.40 is: 622,647.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,074.40 : 780,111.60 = 415,098.40 : x
  2. Step 2: Convert to fraction form
    520,074.40/780,111.60 = 415,098.40/x
  3. Step 3: Cross multiply
    520,074.40x = 780,111.60 × 415,098.40
  4. Step 4: Simplify right side
    520,074.40x = 323,823,076,981.44
  5. Step 5: Solve for x
    x = 323,823,076,981.44/520,074.40
  6. Step 6: Final answer
    x = 622,647.60

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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.