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Finding the Fourth Proportional to 397,545.80, 597,009.90 and 210,921.80

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Solution

The fourth proportional to 397,545.80, 597,009.90 and 210,921.80 is: 316,749.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,545.80 : 597,009.90 = 210,921.80 : x
  2. Step 2: Convert to fraction form
    397,545.80/597,009.90 = 210,921.80/x
  3. Step 3: Cross multiply
    397,545.80x = 597,009.90 × 210,921.80
  4. Step 4: Simplify right side
    397,545.80x = 125,922,402,725.82
  5. Step 5: Solve for x
    x = 125,922,402,725.82/397,545.80
  6. Step 6: Final answer
    x = 316,749.42

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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.