Home / 385,545.19-531,101.70-328,000.21

Finding the Fourth Proportional to 385,545.19, 531,101.70 and 328,000.21

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Solution

The fourth proportional to 385,545.19, 531,101.70 and 328,000.21 is: 451,831.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,545.19 : 531,101.70 = 328,000.21 : x
  2. Step 2: Convert to fraction form
    385,545.19/531,101.70 = 328,000.21/x
  3. Step 3: Cross multiply
    385,545.19x = 531,101.70 × 328,000.21
  4. Step 4: Simplify right side
    385,545.19x = 174,201,464,835.85
  5. Step 5: Solve for x
    x = 174,201,464,835.85/385,545.19
  6. Step 6: Final answer
    x = 451,831.51

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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.