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Finding the Fourth Proportional to 631,396.72, 870,200.58 and 478,067.68

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Solution

The fourth proportional to 631,396.72, 870,200.58 and 478,067.68 is: 658,880.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,396.72 : 870,200.58 = 478,067.68 : x
  2. Step 2: Convert to fraction form
    631,396.72/870,200.58 = 478,067.68/x
  3. Step 3: Cross multiply
    631,396.72x = 870,200.58 × 478,067.68
  4. Step 4: Simplify right side
    631,396.72x = 416,014,772,415.25
  5. Step 5: Solve for x
    x = 416,014,772,415.25/631,396.72
  6. Step 6: Final answer
    x = 658,880.16

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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.