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Finding the Fourth Proportional to 518,322.78, 715,286.64 and 291,968.28

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Solution

The fourth proportional to 518,322.78, 715,286.64 and 291,968.28 is: 402,916.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,322.78 : 715,286.64 = 291,968.28 : x
  2. Step 2: Convert to fraction form
    518,322.78/715,286.64 = 291,968.28/x
  3. Step 3: Cross multiply
    518,322.78x = 715,286.64 × 291,968.28
  4. Step 4: Simplify right side
    518,322.78x = 208,841,009,987.78
  5. Step 5: Solve for x
    x = 208,841,009,987.78/518,322.78
  6. Step 6: Final answer
    x = 402,916.90

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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.