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Finding the Fourth Proportional to 520,173.14, 780,417.05 and 368,663.25

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Solution

The fourth proportional to 520,173.14, 780,417.05 and 368,663.25 is: 553,106.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,173.14 : 780,417.05 = 368,663.25 : x
  2. Step 2: Convert to fraction form
    520,173.14/780,417.05 = 368,663.25/x
  3. Step 3: Cross multiply
    520,173.14x = 780,417.05 × 368,663.25
  4. Step 4: Simplify right side
    520,173.14x = 287,711,085,812.41
  5. Step 5: Solve for x
    x = 287,711,085,812.41/520,173.14
  6. Step 6: Final answer
    x = 553,106.39

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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.