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Finding the Fourth Proportional to 653,710.77, 901,861.45 and 378,017.68

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Solution

The fourth proportional to 653,710.77, 901,861.45 and 378,017.68 is: 521,514.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    653,710.77 : 901,861.45 = 378,017.68 : x
  2. Step 2: Convert to fraction form
    653,710.77/901,861.45 = 378,017.68/x
  3. Step 3: Cross multiply
    653,710.77x = 901,861.45 × 378,017.68
  4. Step 4: Simplify right side
    653,710.77x = 340,919,569,810.74
  5. Step 5: Solve for x
    x = 340,919,569,810.74/653,710.77
  6. Step 6: Final answer
    x = 521,514.38

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Double scale
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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.