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Finding the Fourth Proportional to 671,545.08, 926,820.63 and 385,009.20

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Solution

The fourth proportional to 671,545.08, 926,820.63 and 385,009.20 is: 531,363.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    671,545.08 : 926,820.63 = 385,009.20 : x
  2. Step 2: Convert to fraction form
    671,545.08/926,820.63 = 385,009.20/x
  3. Step 3: Cross multiply
    671,545.08x = 926,820.63 × 385,009.20
  4. Step 4: Simplify right side
    671,545.08x = 356,834,469,299.80
  5. Step 5: Solve for x
    x = 356,834,469,299.80/671,545.08
  6. Step 6: Final answer
    x = 531,363.39

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.