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Finding the Fourth Proportional to 677,607.61, 935,081.66 and 387,200.75

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Solution

The fourth proportional to 677,607.61, 935,081.66 and 387,200.75 is: 534,327.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,607.61 : 935,081.66 = 387,200.75 : x
  2. Step 2: Convert to fraction form
    677,607.61/935,081.66 = 387,200.75/x
  3. Step 3: Cross multiply
    677,607.61x = 935,081.66 × 387,200.75
  4. Step 4: Simplify right side
    677,607.61x = 362,064,319,579.24
  5. Step 5: Solve for x
    x = 362,064,319,579.24/677,607.61
  6. Step 6: Final answer
    x = 534,327.41

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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.