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Finding the Fourth Proportional to 520,813.68, 781,336.80 and 221,303.76

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Solution

The fourth proportional to 520,813.68, 781,336.80 and 221,303.76 is: 332,005.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,813.68 : 781,336.80 = 221,303.76 : x
  2. Step 2: Convert to fraction form
    520,813.68/781,336.80 = 221,303.76/x
  3. Step 3: Cross multiply
    520,813.68x = 781,336.80 × 221,303.76
  4. Step 4: Simplify right side
    520,813.68x = 172,912,771,666.37
  5. Step 5: Solve for x
    x = 172,912,771,666.37/520,813.68
  6. Step 6: Final answer
    x = 332,005.05

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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.