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Finding the Fourth Proportional to 257,967.72, 355,990.50 and 143,240.40

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Solution

The fourth proportional to 257,967.72, 355,990.50 and 143,240.40 is: 197,669.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,967.72 : 355,990.50 = 143,240.40 : x
  2. Step 2: Convert to fraction form
    257,967.72/355,990.50 = 143,240.40/x
  3. Step 3: Cross multiply
    257,967.72x = 355,990.50 × 143,240.40
  4. Step 4: Simplify right side
    257,967.72x = 50,992,221,616.20
  5. Step 5: Solve for x
    x = 50,992,221,616.20/257,967.72
  6. Step 6: Final answer
    x = 197,669.00

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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.