Home / 285,280.20-393,686.70-157,955.79

Finding the Fourth Proportional to 285,280.20, 393,686.70 and 157,955.79

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Solution

The fourth proportional to 285,280.20, 393,686.70 and 157,955.79 is: 217,979.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,280.20 : 393,686.70 = 157,955.79 : x
  2. Step 2: Convert to fraction form
    285,280.20/393,686.70 = 157,955.79/x
  3. Step 3: Cross multiply
    285,280.20x = 393,686.70 × 157,955.79
  4. Step 4: Simplify right side
    285,280.20x = 62,185,093,710.99
  5. Step 5: Solve for x
    x = 62,185,093,710.99/285,280.20
  6. Step 6: Final answer
    x = 217,979.01

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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.