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Finding the Fourth Proportional to 515,478.69, 711,364.47 and 286,036.89

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Solution

The fourth proportional to 515,478.69, 711,364.47 and 286,036.89 is: 394,733.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,478.69 : 711,364.47 = 286,036.89 : x
  2. Step 2: Convert to fraction form
    515,478.69/711,364.47 = 286,036.89/x
  3. Step 3: Cross multiply
    515,478.69x = 711,364.47 × 286,036.89
  4. Step 4: Simplify right side
    515,478.69x = 203,476,480,655.30
  5. Step 5: Solve for x
    x = 203,476,480,655.30/515,478.69
  6. Step 6: Final answer
    x = 394,733.06

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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.