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Finding the Fourth Proportional to 513,457.40, 768,728.10 and 485,528.60

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Solution

The fourth proportional to 513,457.40, 768,728.10 and 485,528.60 is: 726,914.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,457.40 : 768,728.10 = 485,528.60 : x
  2. Step 2: Convert to fraction form
    513,457.40/768,728.10 = 485,528.60/x
  3. Step 3: Cross multiply
    513,457.40x = 768,728.10 × 485,528.60
  4. Step 4: Simplify right side
    513,457.40x = 373,239,478,173.66
  5. Step 5: Solve for x
    x = 373,239,478,173.66/513,457.40
  6. Step 6: Final answer
    x = 726,914.21

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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.