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Finding the Fourth Proportional to 387,111.15, 580,666.46 and 120,894.48

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Solution

The fourth proportional to 387,111.15, 580,666.46 and 120,894.48 is: 181,341.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,111.15 : 580,666.46 = 120,894.48 : x
  2. Step 2: Convert to fraction form
    387,111.15/580,666.46 = 120,894.48/x
  3. Step 3: Cross multiply
    387,111.15x = 580,666.46 × 120,894.48
  4. Step 4: Simplify right side
    387,111.15x = 70,199,369,130.67
  5. Step 5: Solve for x
    x = 70,199,369,130.67/387,111.15
  6. Step 6: Final answer
    x = 181,341.64

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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.