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Finding the Fourth Proportional to 260,045.40, 390,942.90 and 221,554.20

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Solution

The fourth proportional to 260,045.40, 390,942.90 and 221,554.20 is: 333,076.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,045.40 : 390,942.90 = 221,554.20 : x
  2. Step 2: Convert to fraction form
    260,045.40/390,942.90 = 221,554.20/x
  3. Step 3: Cross multiply
    260,045.40x = 390,942.90 × 221,554.20
  4. Step 4: Simplify right side
    260,045.40x = 86,615,041,455.18
  5. Step 5: Solve for x
    x = 86,615,041,455.18/260,045.40
  6. Step 6: Final answer
    x = 333,076.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.