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Finding the Fourth Proportional to 623,713.20, 935,569.80 and 615,418.80

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Solution

The fourth proportional to 623,713.20, 935,569.80 and 615,418.80 is: 923,128.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,713.20 : 935,569.80 = 615,418.80 : x
  2. Step 2: Convert to fraction form
    623,713.20/935,569.80 = 615,418.80/x
  3. Step 3: Cross multiply
    623,713.20x = 935,569.80 × 615,418.80
  4. Step 4: Simplify right side
    623,713.20x = 575,767,243,632.24
  5. Step 5: Solve for x
    x = 575,767,243,632.24/623,713.20
  6. Step 6: Final answer
    x = 923,128.20

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Double scale
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Similar ratio
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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.