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Finding the Fourth Proportional to 620,102.70, 930,154.05 and 578,112.30

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Solution

The fourth proportional to 620,102.70, 930,154.05 and 578,112.30 is: 867,168.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,102.70 : 930,154.05 = 578,112.30 : x
  2. Step 2: Convert to fraction form
    620,102.70/930,154.05 = 578,112.30/x
  3. Step 3: Cross multiply
    620,102.70x = 930,154.05 × 578,112.30
  4. Step 4: Simplify right side
    620,102.70x = 537,733,497,199.82
  5. Step 5: Solve for x
    x = 537,733,497,199.82/620,102.70
  6. Step 6: Final answer
    x = 867,168.45

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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.