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Finding the Fourth Proportional to 528,678.01, 729,556.09 and 286,955.43

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Solution

The fourth proportional to 528,678.01, 729,556.09 and 286,955.43 is: 395,987.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,678.01 : 729,556.09 = 286,955.43 : x
  2. Step 2: Convert to fraction form
    528,678.01/729,556.09 = 286,955.43/x
  3. Step 3: Cross multiply
    528,678.01x = 729,556.09 × 286,955.43
  4. Step 4: Simplify right side
    528,678.01x = 209,350,085,024.54
  5. Step 5: Solve for x
    x = 209,350,085,024.54/528,678.01
  6. Step 6: Final answer
    x = 395,987.88

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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.