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Finding the Fourth Proportional to 583,213.50, 874,820.25 and 139,981.50

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Solution

The fourth proportional to 583,213.50, 874,820.25 and 139,981.50 is: 209,972.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    583,213.50 : 874,820.25 = 139,981.50 : x
  2. Step 2: Convert to fraction form
    583,213.50/874,820.25 = 139,981.50/x
  3. Step 3: Cross multiply
    583,213.50x = 874,820.25 × 139,981.50
  4. Step 4: Simplify right side
    583,213.50x = 122,458,650,825.38
  5. Step 5: Solve for x
    x = 122,458,650,825.38/583,213.50
  6. Step 6: Final answer
    x = 209,972.25

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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.