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Finding the Fourth Proportional to 530,497.36, 732,086.44 and 288,781.77

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Solution

The fourth proportional to 530,497.36, 732,086.44 and 288,781.77 is: 398,518.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    530,497.36 : 732,086.44 = 288,781.77 : x
  2. Step 2: Convert to fraction form
    530,497.36/732,086.44 = 288,781.77/x
  3. Step 3: Cross multiply
    530,497.36x = 732,086.44 × 288,781.77
  4. Step 4: Simplify right side
    530,497.36x = 211,413,217,936.20
  5. Step 5: Solve for x
    x = 211,413,217,936.20/530,497.36
  6. Step 6: Final answer
    x = 398,518.89

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Double scale
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Similar ratio
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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.