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Finding the Fourth Proportional to 239,711.40, 330,723 and 154,878.48

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Solution

The fourth proportional to 239,711.40, 330,723 and 154,878.48 is: 213,681.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,711.40 : 330,723 = 154,878.48 : x
  2. Step 2: Convert to fraction form
    239,711.40/330,723 = 154,878.48/x
  3. Step 3: Cross multiply
    239,711.40x = 330,723 × 154,878.48
  4. Step 4: Simplify right side
    239,711.40x = 51,221,875,541.04
  5. Step 5: Solve for x
    x = 51,221,875,541.04/239,711.40
  6. Step 6: Final answer
    x = 213,681.43

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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.