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Finding the Fourth Proportional to 490,643.40, 735,965.10 and 443,987.40

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Solution

The fourth proportional to 490,643.40, 735,965.10 and 443,987.40 is: 665,981.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,643.40 : 735,965.10 = 443,987.40 : x
  2. Step 2: Convert to fraction form
    490,643.40/735,965.10 = 443,987.40/x
  3. Step 3: Cross multiply
    490,643.40x = 735,965.10 × 443,987.40
  4. Step 4: Simplify right side
    490,643.40x = 326,759,231,239.74
  5. Step 5: Solve for x
    x = 326,759,231,239.74/490,643.40
  6. Step 6: Final answer
    x = 665,981.10

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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.