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Finding the Fourth Proportional to 690,970.54, 953,031.79 and 457,976.11

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Solution

The fourth proportional to 690,970.54, 953,031.79 and 457,976.11 is: 631,670.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,970.54 : 953,031.79 = 457,976.11 : x
  2. Step 2: Convert to fraction form
    690,970.54/953,031.79 = 457,976.11/x
  3. Step 3: Cross multiply
    690,970.54x = 953,031.79 × 457,976.11
  4. Step 4: Simplify right side
    690,970.54x = 436,465,784,835.50
  5. Step 5: Solve for x
    x = 436,465,784,835.50/690,970.54
  6. Step 6: Final answer
    x = 631,670.61

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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.