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Finding the Fourth Proportional to 418,803.84, 577,964.40 and 239,990.40

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Solution

The fourth proportional to 418,803.84, 577,964.40 and 239,990.40 is: 331,195.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,803.84 : 577,964.40 = 239,990.40 : x
  2. Step 2: Convert to fraction form
    418,803.84/577,964.40 = 239,990.40/x
  3. Step 3: Cross multiply
    418,803.84x = 577,964.40 × 239,990.40
  4. Step 4: Simplify right side
    418,803.84x = 138,705,907,541.76
  5. Step 5: Solve for x
    x = 138,705,907,541.76/418,803.84
  6. Step 6: Final answer
    x = 331,195.41

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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.