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Finding the Fourth Proportional to 521,000.49, 781,492.20 and 166,009.69

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Solution

The fourth proportional to 521,000.49, 781,492.20 and 166,009.69 is: 249,011.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,000.49 : 781,492.20 = 166,009.69 : x
  2. Step 2: Convert to fraction form
    521,000.49/781,492.20 = 166,009.69/x
  3. Step 3: Cross multiply
    521,000.49x = 781,492.20 × 166,009.69
  4. Step 4: Simplify right side
    521,000.49x = 129,735,277,859.42
  5. Step 5: Solve for x
    x = 129,735,277,859.42/521,000.49
  6. Step 6: Final answer
    x = 249,011.82

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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.