Home / 291,078.43-401,555.47-210,378.13

Finding the Fourth Proportional to 291,078.43, 401,555.47 and 210,378.13

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Solution

The fourth proportional to 291,078.43, 401,555.47 and 210,378.13 is: 290,225.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,078.43 : 401,555.47 = 210,378.13 : x
  2. Step 2: Convert to fraction form
    291,078.43/401,555.47 = 210,378.13/x
  3. Step 3: Cross multiply
    291,078.43x = 401,555.47 × 210,378.13
  4. Step 4: Simplify right side
    291,078.43x = 84,478,488,869.87
  5. Step 5: Solve for x
    x = 84,478,488,869.87/291,078.43
  6. Step 6: Final answer
    x = 290,225.86

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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.