Home / 257,424.20-386,136.30-212,809.40

Finding the Fourth Proportional to 257,424.20, 386,136.30 and 212,809.40

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Solution

The fourth proportional to 257,424.20, 386,136.30 and 212,809.40 is: 319,214.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,424.20 : 386,136.30 = 212,809.40 : x
  2. Step 2: Convert to fraction form
    257,424.20/386,136.30 = 212,809.40/x
  3. Step 3: Cross multiply
    257,424.20x = 386,136.30 × 212,809.40
  4. Step 4: Simplify right side
    257,424.20x = 82,173,434,321.22
  5. Step 5: Solve for x
    x = 82,173,434,321.22/257,424.20
  6. Step 6: Final answer
    x = 319,214.10

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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.