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Finding the Fourth Proportional to 631,981.76, 872,099.52 and 345,444.80

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Solution

The fourth proportional to 631,981.76, 872,099.52 and 345,444.80 is: 476,694.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,981.76 : 872,099.52 = 345,444.80 : x
  2. Step 2: Convert to fraction form
    631,981.76/872,099.52 = 345,444.80/x
  3. Step 3: Cross multiply
    631,981.76x = 872,099.52 × 345,444.80
  4. Step 4: Simplify right side
    631,981.76x = 301,262,244,266.50
  5. Step 5: Solve for x
    x = 301,262,244,266.50/631,981.76
  6. Step 6: Final answer
    x = 476,694.52

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Double scale
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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.