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Finding the Fourth Proportional to 306,956.88, 423,599.76 and 215,210.88

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Solution

The fourth proportional to 306,956.88, 423,599.76 and 215,210.88 is: 296,990.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,956.88 : 423,599.76 = 215,210.88 : x
  2. Step 2: Convert to fraction form
    306,956.88/423,599.76 = 215,210.88/x
  3. Step 3: Cross multiply
    306,956.88x = 423,599.76 × 215,210.88
  4. Step 4: Simplify right side
    306,956.88x = 91,163,277,117.39
  5. Step 5: Solve for x
    x = 91,163,277,117.39/306,956.88
  6. Step 6: Final answer
    x = 296,990.50

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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.