Home / 387,296.07-534,457.89-215,209.59

Finding the Fourth Proportional to 387,296.07, 534,457.89 and 215,209.59

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Solution

The fourth proportional to 387,296.07, 534,457.89 and 215,209.59 is: 296,983.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,296.07 : 534,457.89 = 215,209.59 : x
  2. Step 2: Convert to fraction form
    387,296.07/534,457.89 = 215,209.59/x
  3. Step 3: Cross multiply
    387,296.07x = 534,457.89 × 215,209.59
  4. Step 4: Simplify right side
    387,296.07x = 115,020,463,379.17
  5. Step 5: Solve for x
    x = 115,020,463,379.17/387,296.07
  6. Step 6: Final answer
    x = 296,983.30

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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.