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Finding the Fourth Proportional to 621,384.93, 857,740.01 and 545,710.05

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Solution

The fourth proportional to 621,384.93, 857,740.01 and 545,710.05 is: 753,280.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,384.93 : 857,740.01 = 545,710.05 : x
  2. Step 2: Convert to fraction form
    621,384.93/857,740.01 = 545,710.05/x
  3. Step 3: Cross multiply
    621,384.93x = 857,740.01 × 545,710.05
  4. Step 4: Simplify right side
    621,384.93x = 468,077,341,015.55
  5. Step 5: Solve for x
    x = 468,077,341,015.55/621,384.93
  6. Step 6: Final answer
    x = 753,280.81

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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.