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Finding the Fourth Proportional to 520,156.85, 717,755.90 and 290,714.58

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Solution

The fourth proportional to 520,156.85, 717,755.90 and 290,714.58 is: 401,152.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,156.85 : 717,755.90 = 290,714.58 : x
  2. Step 2: Convert to fraction form
    520,156.85/717,755.90 = 290,714.58/x
  3. Step 3: Cross multiply
    520,156.85x = 717,755.90 × 290,714.58
  4. Step 4: Simplify right side
    520,156.85x = 208,662,103,557.45
  5. Step 5: Solve for x
    x = 208,662,103,557.45/520,156.85
  6. Step 6: Final answer
    x = 401,152.28

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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.