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Finding the Fourth Proportional to 389,987.04, 538,369.20 and 246,816.48

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Solution

The fourth proportional to 389,987.04, 538,369.20 and 246,816.48 is: 340,725.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,987.04 : 538,369.20 = 246,816.48 : x
  2. Step 2: Convert to fraction form
    389,987.04/538,369.20 = 246,816.48/x
  3. Step 3: Cross multiply
    389,987.04x = 538,369.20 × 246,816.48
  4. Step 4: Simplify right side
    389,987.04x = 132,878,390,884.42
  5. Step 5: Solve for x
    x = 132,878,390,884.42/389,987.04
  6. Step 6: Final answer
    x = 340,725.15

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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.