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Finding the Fourth Proportional to 553,685.70, 830,528.55 and 543,188.10

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Solution

The fourth proportional to 553,685.70, 830,528.55 and 543,188.10 is: 814,782.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,685.70 : 830,528.55 = 543,188.10 : x
  2. Step 2: Convert to fraction form
    553,685.70/830,528.55 = 543,188.10/x
  3. Step 3: Cross multiply
    553,685.70x = 830,528.55 × 543,188.10
  4. Step 4: Simplify right side
    553,685.70x = 451,133,225,070.26
  5. Step 5: Solve for x
    x = 451,133,225,070.26/553,685.70
  6. Step 6: Final answer
    x = 814,782.15

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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.