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Finding the Fourth Proportional to 583,801.78, 805,646.10 and 315,529.78

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Solution

The fourth proportional to 583,801.78, 805,646.10 and 315,529.78 is: 435,430.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    583,801.78 : 805,646.10 = 315,529.78 : x
  2. Step 2: Convert to fraction form
    583,801.78/805,646.10 = 315,529.78/x
  3. Step 3: Cross multiply
    583,801.78x = 805,646.10 × 315,529.78
  4. Step 4: Simplify right side
    583,801.78x = 254,205,336,690.86
  5. Step 5: Solve for x
    x = 254,205,336,690.86/583,801.78
  6. Step 6: Final answer
    x = 435,430.90

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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.