Home / 305,839.71-421,888.58-284,190.24

Finding the Fourth Proportional to 305,839.71, 421,888.58 and 284,190.24

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Solution

The fourth proportional to 305,839.71, 421,888.58 and 284,190.24 is: 392,024.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,839.71 : 421,888.58 = 284,190.24 : x
  2. Step 2: Convert to fraction form
    305,839.71/421,888.58 = 284,190.24/x
  3. Step 3: Cross multiply
    305,839.71x = 421,888.58 × 284,190.24
  4. Step 4: Simplify right side
    305,839.71x = 119,896,616,803.46
  5. Step 5: Solve for x
    x = 119,896,616,803.46/305,839.71
  6. Step 6: Final answer
    x = 392,024.36

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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.