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Finding the Fourth Proportional to 623,856.08, 859,910.28 and 487,649.36

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Solution

The fourth proportional to 623,856.08, 859,910.28 and 487,649.36 is: 672,165.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,856.08 : 859,910.28 = 487,649.36 : x
  2. Step 2: Convert to fraction form
    623,856.08/859,910.28 = 487,649.36/x
  3. Step 3: Cross multiply
    623,856.08x = 859,910.28 × 487,649.36
  4. Step 4: Simplify right side
    623,856.08x = 419,334,697,699.42
  5. Step 5: Solve for x
    x = 419,334,697,699.42/623,856.08
  6. Step 6: Final answer
    x = 672,165.76

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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.