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Finding the Fourth Proportional to 613,272.90, 919,909.35 and 453,840.60

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Solution

The fourth proportional to 613,272.90, 919,909.35 and 453,840.60 is: 680,760.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,272.90 : 919,909.35 = 453,840.60 : x
  2. Step 2: Convert to fraction form
    613,272.90/919,909.35 = 453,840.60/x
  3. Step 3: Cross multiply
    613,272.90x = 919,909.35 × 453,840.60
  4. Step 4: Simplify right side
    613,272.90x = 417,492,211,349.61
  5. Step 5: Solve for x
    x = 417,492,211,349.61/613,272.90
  6. Step 6: Final answer
    x = 680,760.90

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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.