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Finding the Fourth Proportional to 490,672.35, 736,008.53 and 420,688.35

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Solution

The fourth proportional to 490,672.35, 736,008.53 and 420,688.35 is: 631,032.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,672.35 : 736,008.53 = 420,688.35 : x
  2. Step 2: Convert to fraction form
    490,672.35/736,008.53 = 420,688.35/x
  3. Step 3: Cross multiply
    490,672.35x = 736,008.53 × 420,688.35
  4. Step 4: Simplify right side
    490,672.35x = 309,630,211,968.18
  5. Step 5: Solve for x
    x = 309,630,211,968.18/490,672.35
  6. Step 6: Final answer
    x = 631,032.53

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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.