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Finding the Fourth Proportional to 257,871.80, 386,807.70 and 163,393.40

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Solution

The fourth proportional to 257,871.80, 386,807.70 and 163,393.40 is: 245,090.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,871.80 : 386,807.70 = 163,393.40 : x
  2. Step 2: Convert to fraction form
    257,871.80/386,807.70 = 163,393.40/x
  3. Step 3: Cross multiply
    257,871.80x = 386,807.70 × 163,393.40
  4. Step 4: Simplify right side
    257,871.80x = 63,201,825,249.18
  5. Step 5: Solve for x
    x = 63,201,825,249.18/257,871.80
  6. Step 6: Final answer
    x = 245,090.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.