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Finding the Fourth Proportional to 519,686.72, 717,154.08 and 290,237.76

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Solution

The fourth proportional to 519,686.72, 717,154.08 and 290,237.76 is: 400,520.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,686.72 : 717,154.08 = 290,237.76 : x
  2. Step 2: Convert to fraction form
    519,686.72/717,154.08 = 290,237.76/x
  3. Step 3: Cross multiply
    519,686.72x = 717,154.08 × 290,237.76
  4. Step 4: Simplify right side
    519,686.72x = 208,145,193,754.06
  5. Step 5: Solve for x
    x = 208,145,193,754.06/519,686.72
  6. Step 6: Final answer
    x = 400,520.52

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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.