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Finding the Fourth Proportional to 490,707.60, 736,061.40 and 420,723.60

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Solution

The fourth proportional to 490,707.60, 736,061.40 and 420,723.60 is: 631,085.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,707.60 : 736,061.40 = 420,723.60 : x
  2. Step 2: Convert to fraction form
    490,707.60/736,061.40 = 420,723.60/x
  3. Step 3: Cross multiply
    490,707.60x = 736,061.40 × 420,723.60
  4. Step 4: Simplify right side
    490,707.60x = 309,678,402,029.04
  5. Step 5: Solve for x
    x = 309,678,402,029.04/490,707.60
  6. Step 6: Final answer
    x = 631,085.40

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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.