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Finding the Fourth Proportional to 387,057.51, 579,545.62 and 315,685.69

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Solution

The fourth proportional to 387,057.51, 579,545.62 and 315,685.69 is: 472,679.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,057.51 : 579,545.62 = 315,685.69 : x
  2. Step 2: Convert to fraction form
    387,057.51/579,545.62 = 315,685.69/x
  3. Step 3: Cross multiply
    387,057.51x = 579,545.62 × 315,685.69
  4. Step 4: Simplify right side
    387,057.51x = 182,954,256,698.10
  5. Step 5: Solve for x
    x = 182,954,256,698.10/387,057.51
  6. Step 6: Final answer
    x = 472,679.77

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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.