Home / 387,235.08-534,386.54-215,153.28

Finding the Fourth Proportional to 387,235.08, 534,386.54 and 215,153.28

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Solution

The fourth proportional to 387,235.08, 534,386.54 and 215,153.28 is: 296,912.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,235.08 : 534,386.54 = 215,153.28 : x
  2. Step 2: Convert to fraction form
    387,235.08/534,386.54 = 215,153.28/x
  3. Step 3: Cross multiply
    387,235.08x = 534,386.54 × 215,153.28
  4. Step 4: Simplify right side
    387,235.08x = 114,975,016,868.85
  5. Step 5: Solve for x
    x = 114,975,016,868.85/387,235.08
  6. Step 6: Final answer
    x = 296,912.71

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1.5x scale

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.