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Finding the Fourth Proportional to 260,359.71, 388,809.31 and 257,541.45

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Solution

The fourth proportional to 260,359.71, 388,809.31 and 257,541.45 is: 384,600.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,359.71 : 388,809.31 = 257,541.45 : x
  2. Step 2: Convert to fraction form
    260,359.71/388,809.31 = 257,541.45/x
  3. Step 3: Cross multiply
    260,359.71x = 388,809.31 × 257,541.45
  4. Step 4: Simplify right side
    260,359.71x = 100,134,513,470.90
  5. Step 5: Solve for x
    x = 100,134,513,470.90/260,359.71
  6. Step 6: Final answer
    x = 384,600.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.