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Finding the Fourth Proportional to 630,960.37, 870,720.82 and 344,480.47

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Solution

The fourth proportional to 630,960.37, 870,720.82 and 344,480.47 is: 475,380.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,960.37 : 870,720.82 = 344,480.47 : x
  2. Step 2: Convert to fraction form
    630,960.37/870,720.82 = 344,480.47/x
  3. Step 3: Cross multiply
    630,960.37x = 870,720.82 × 344,480.47
  4. Step 4: Simplify right side
    630,960.37x = 299,946,317,312.39
  5. Step 5: Solve for x
    x = 299,946,317,312.39/630,960.37
  6. Step 6: Final answer
    x = 475,380.60

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.