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Finding the Fourth Proportional to 576,749.40, 864,864.90 and 221,645.40

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Solution

The fourth proportional to 576,749.40, 864,864.90 and 221,645.40 is: 332,368.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    576,749.40 : 864,864.90 = 221,645.40 : x
  2. Step 2: Convert to fraction form
    576,749.40/864,864.90 = 221,645.40/x
  3. Step 3: Cross multiply
    576,749.40x = 864,864.90 × 221,645.40
  4. Step 4: Simplify right side
    576,749.40x = 191,693,326,706.46
  5. Step 5: Solve for x
    x = 191,693,326,706.46/576,749.40
  6. Step 6: Final answer
    x = 332,368.49

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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.