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Finding the Fourth Proportional to 387,056.76, 579,544.49 and 315,684.93

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Solution

The fourth proportional to 387,056.76, 579,544.49 and 315,684.93 is: 472,678.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,056.76 : 579,544.49 = 315,684.93 : x
  2. Step 2: Convert to fraction form
    387,056.76/579,544.49 = 315,684.93/x
  3. Step 3: Cross multiply
    387,056.76x = 579,544.49 × 315,684.93
  4. Step 4: Simplify right side
    387,056.76x = 182,953,460,179.11
  5. Step 5: Solve for x
    x = 182,953,460,179.11/387,056.76
  6. Step 6: Final answer
    x = 472,678.63

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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.