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Finding the Fourth Proportional to 621,644.40, 930,911.40 and 497,228.40

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Solution

The fourth proportional to 621,644.40, 930,911.40 and 497,228.40 is: 744,598.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,644.40 : 930,911.40 = 497,228.40 : x
  2. Step 2: Convert to fraction form
    621,644.40/930,911.40 = 497,228.40/x
  3. Step 3: Cross multiply
    621,644.40x = 930,911.40 × 497,228.40
  4. Step 4: Simplify right side
    621,644.40x = 462,875,585,963.76
  5. Step 5: Solve for x
    x = 462,875,585,963.76/621,644.40
  6. Step 6: Final answer
    x = 744,598.66

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1.5x scale

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.