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Finding the Fourth Proportional to 390,164.60, 538,410.60 and 245,046.22

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Solution

The fourth proportional to 390,164.60, 538,410.60 and 245,046.22 is: 338,153.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,164.60 : 538,410.60 = 245,046.22 : x
  2. Step 2: Convert to fraction form
    390,164.60/538,410.60 = 245,046.22/x
  3. Step 3: Cross multiply
    390,164.60x = 538,410.60 × 245,046.22
  4. Step 4: Simplify right side
    390,164.60x = 131,935,482,337.93
  5. Step 5: Solve for x
    x = 131,935,482,337.93/390,164.60
  6. Step 6: Final answer
    x = 338,153.39

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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.