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Finding the Fourth Proportional to 371,054.76, 512,055.68 and 209,906.40

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Solution

The fourth proportional to 371,054.76, 512,055.68 and 209,906.40 is: 289,670.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,054.76 : 512,055.68 = 209,906.40 : x
  2. Step 2: Convert to fraction form
    371,054.76/512,055.68 = 209,906.40/x
  3. Step 3: Cross multiply
    371,054.76x = 512,055.68 × 209,906.40
  4. Step 4: Simplify right side
    371,054.76x = 107,483,764,388.35
  5. Step 5: Solve for x
    x = 107,483,764,388.35/371,054.76
  6. Step 6: Final answer
    x = 289,670.89

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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.