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Finding the Fourth Proportional to 306,888.84, 423,493.38 and 221,858.28

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Solution

The fourth proportional to 306,888.84, 423,493.38 and 221,858.28 is: 306,154.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,888.84 : 423,493.38 = 221,858.28 : x
  2. Step 2: Convert to fraction form
    306,888.84/423,493.38 = 221,858.28/x
  3. Step 3: Cross multiply
    306,888.84x = 423,493.38 × 221,858.28
  4. Step 4: Simplify right side
    306,888.84x = 93,955,512,878.19
  5. Step 5: Solve for x
    x = 93,955,512,878.19/306,888.84
  6. Step 6: Final answer
    x = 306,154.87

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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.