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Finding the Fourth Proportional to 478,668.69, 660,781.07 and 340,936.29

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Solution

The fourth proportional to 478,668.69, 660,781.07 and 340,936.29 is: 470,647.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,668.69 : 660,781.07 = 340,936.29 : x
  2. Step 2: Convert to fraction form
    478,668.69/660,781.07 = 340,936.29/x
  3. Step 3: Cross multiply
    478,668.69x = 660,781.07 × 340,936.29
  4. Step 4: Simplify right side
    478,668.69x = 225,284,244,803.35
  5. Step 5: Solve for x
    x = 225,284,244,803.35/478,668.69
  6. Step 6: Final answer
    x = 470,647.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.