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Finding the Fourth Proportional to 689,853.60, 952,111.80 and 403,318.80

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Solution

The fourth proportional to 689,853.60, 952,111.80 and 403,318.80 is: 556,646.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,853.60 : 952,111.80 = 403,318.80 : x
  2. Step 2: Convert to fraction form
    689,853.60/952,111.80 = 403,318.80/x
  3. Step 3: Cross multiply
    689,853.60x = 952,111.80 × 403,318.80
  4. Step 4: Simplify right side
    689,853.60x = 384,004,588,641.84
  5. Step 5: Solve for x
    x = 384,004,588,641.84/689,853.60
  6. Step 6: Final answer
    x = 556,646.50

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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.