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Finding the Fourth Proportional to 490,681.60, 736,022.40 and 420,697.60

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Solution

The fourth proportional to 490,681.60, 736,022.40 and 420,697.60 is: 631,046.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,681.60 : 736,022.40 = 420,697.60 : x
  2. Step 2: Convert to fraction form
    490,681.60/736,022.40 = 420,697.60/x
  3. Step 3: Cross multiply
    490,681.60x = 736,022.40 × 420,697.60
  4. Step 4: Simplify right side
    490,681.60x = 309,642,857,226.24
  5. Step 5: Solve for x
    x = 309,642,857,226.24/490,681.60
  6. Step 6: Final answer
    x = 631,046.40

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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.