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Finding the Fourth Proportional to 355,053.78, 531,547.11 and 186,173.64

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Solution

The fourth proportional to 355,053.78, 531,547.11 and 186,173.64 is: 278,718.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,053.78 : 531,547.11 = 186,173.64 : x
  2. Step 2: Convert to fraction form
    355,053.78/531,547.11 = 186,173.64/x
  3. Step 3: Cross multiply
    355,053.78x = 531,547.11 × 186,173.64
  4. Step 4: Simplify right side
    355,053.78x = 98,960,060,300.18
  5. Step 5: Solve for x
    x = 98,960,060,300.18/355,053.78
  6. Step 6: Final answer
    x = 278,718.51

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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.