Home / 387,139.45-534,237.58-215,068.23

Finding the Fourth Proportional to 387,139.45, 534,237.58 and 215,068.23

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Solution

The fourth proportional to 387,139.45, 534,237.58 and 215,068.23 is: 296,785.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,139.45 : 534,237.58 = 215,068.23 : x
  2. Step 2: Convert to fraction form
    387,139.45/534,237.58 = 215,068.23/x
  3. Step 3: Cross multiply
    387,139.45x = 534,237.58 × 215,068.23
  4. Step 4: Simplify right side
    387,139.45x = 114,897,530,730.08
  5. Step 5: Solve for x
    x = 114,897,530,730.08/387,139.45
  6. Step 6: Final answer
    x = 296,785.90

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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.