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Finding the Fourth Proportional to 518,784.75, 715,924.17 and 292,430.25

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Solution

The fourth proportional to 518,784.75, 715,924.17 and 292,430.25 is: 403,554.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,784.75 : 715,924.17 = 292,430.25 : x
  2. Step 2: Convert to fraction form
    518,784.75/715,924.17 = 292,430.25/x
  3. Step 3: Cross multiply
    518,784.75x = 715,924.17 × 292,430.25
  4. Step 4: Simplify right side
    518,784.75x = 209,357,884,014.14
  5. Step 5: Solve for x
    x = 209,357,884,014.14/518,784.75
  6. Step 6: Final answer
    x = 403,554.43

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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.