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Finding the Fourth Proportional to 630,545.40, 945,818.10 and 578,935.80

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Solution

The fourth proportional to 630,545.40, 945,818.10 and 578,935.80 is: 868,403.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,545.40 : 945,818.10 = 578,935.80 : x
  2. Step 2: Convert to fraction form
    630,545.40/945,818.10 = 578,935.80/x
  3. Step 3: Cross multiply
    630,545.40x = 945,818.10 × 578,935.80
  4. Step 4: Simplify right side
    630,545.40x = 547,567,958,377.98
  5. Step 5: Solve for x
    x = 547,567,958,377.98/630,545.40
  6. Step 6: Final answer
    x = 868,403.70

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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.