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Finding the Fourth Proportional to 289,041.48, 399,258.45 and 221,888.30

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Solution

The fourth proportional to 289,041.48, 399,258.45 and 221,888.30 is: 306,498.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,041.48 : 399,258.45 = 221,888.30 : x
  2. Step 2: Convert to fraction form
    289,041.48/399,258.45 = 221,888.30/x
  3. Step 3: Cross multiply
    289,041.48x = 399,258.45 × 221,888.30
  4. Step 4: Simplify right side
    289,041.48x = 88,590,776,734.84
  5. Step 5: Solve for x
    x = 88,590,776,734.84/289,041.48
  6. Step 6: Final answer
    x = 306,498.49

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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.