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Finding the Fourth Proportional to 624,072.30, 936,108.45 and 372,129.90

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Solution

The fourth proportional to 624,072.30, 936,108.45 and 372,129.90 is: 558,194.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,072.30 : 936,108.45 = 372,129.90 : x
  2. Step 2: Convert to fraction form
    624,072.30/936,108.45 = 372,129.90/x
  3. Step 3: Cross multiply
    624,072.30x = 936,108.45 × 372,129.90
  4. Step 4: Simplify right side
    624,072.30x = 348,353,943,887.66
  5. Step 5: Solve for x
    x = 348,353,943,887.66/624,072.30
  6. Step 6: Final answer
    x = 558,194.85

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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.