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Finding the Fourth Proportional to 615,203.40, 922,805.10 and 438,056.40

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Solution

The fourth proportional to 615,203.40, 922,805.10 and 438,056.40 is: 657,084.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,203.40 : 922,805.10 = 438,056.40 : x
  2. Step 2: Convert to fraction form
    615,203.40/922,805.10 = 438,056.40/x
  3. Step 3: Cross multiply
    615,203.40x = 922,805.10 × 438,056.40
  4. Step 4: Simplify right side
    615,203.40x = 404,240,680,007.64
  5. Step 5: Solve for x
    x = 404,240,680,007.64/615,203.40
  6. Step 6: Final answer
    x = 657,084.60

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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.