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Finding the Fourth Proportional to 514,809.60, 772,214.40 and 278,613.60

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Solution

The fourth proportional to 514,809.60, 772,214.40 and 278,613.60 is: 417,920.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    514,809.60 : 772,214.40 = 278,613.60 : x
  2. Step 2: Convert to fraction form
    514,809.60/772,214.40 = 278,613.60/x
  3. Step 3: Cross multiply
    514,809.60x = 772,214.40 × 278,613.60
  4. Step 4: Simplify right side
    514,809.60x = 215,149,433,955.84
  5. Step 5: Solve for x
    x = 215,149,433,955.84/514,809.60
  6. Step 6: Final answer
    x = 417,920.40

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.