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Finding the Fourth Proportional to 621,830.40, 872,774.40 and 621,830.40

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Solution

The fourth proportional to 621,830.40, 872,774.40 and 621,830.40 is: 872,774.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,830.40 : 872,774.40 = 621,830.40 : x
  2. Step 2: Convert to fraction form
    621,830.40/872,774.40 = 621,830.40/x
  3. Step 3: Cross multiply
    621,830.40x = 872,774.40 × 621,830.40
  4. Step 4: Simplify right side
    621,830.40x = 542,717,654,261.76
  5. Step 5: Solve for x
    x = 542,717,654,261.76/621,830.40
  6. Step 6: Final answer
    x = 872,774.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.