Home / 661,821.20-993,142.20-346,504.40

Finding the Fourth Proportional to 661,821.20, 993,142.20 and 346,504.40

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Solution

The fourth proportional to 661,821.20, 993,142.20 and 346,504.40 is: 519,971.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,821.20 : 993,142.20 = 346,504.40 : x
  2. Step 2: Convert to fraction form
    661,821.20/993,142.20 = 346,504.40/x
  3. Step 3: Cross multiply
    661,821.20x = 993,142.20 × 346,504.40
  4. Step 4: Simplify right side
    661,821.20x = 344,128,142,125.68
  5. Step 5: Solve for x
    x = 344,128,142,125.68/661,821.20
  6. Step 6: Final answer
    x = 519,971.47

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Half scale
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Double scale
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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.