Home / 387,811.41-535,114.53-215,706.93

Finding the Fourth Proportional to 387,811.41, 535,114.53 and 215,706.93

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Solution

The fourth proportional to 387,811.41, 535,114.53 and 215,706.93 is: 297,639.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,811.41 : 535,114.53 = 215,706.93 : x
  2. Step 2: Convert to fraction form
    387,811.41/535,114.53 = 215,706.93/x
  3. Step 3: Cross multiply
    387,811.41x = 535,114.53 × 215,706.93
  4. Step 4: Simplify right side
    387,811.41x = 115,427,912,464.69
  5. Step 5: Solve for x
    x = 115,427,912,464.69/387,811.41
  6. Step 6: Final answer
    x = 297,639.29

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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.