Home / 821,256.60-1,231,301.70-315,622.20

Finding the Fourth Proportional to 821,256.60, 1,231,301.70 and 315,622.20

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Solution

The fourth proportional to 821,256.60, 1,231,301.70 and 315,622.20 is: 473,209.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,256.60 : 1,231,301.70 = 315,622.20 : x
  2. Step 2: Convert to fraction form
    821,256.60/1,231,301.70 = 315,622.20/x
  3. Step 3: Cross multiply
    821,256.60x = 1,231,301.70 × 315,622.20
  4. Step 4: Simplify right side
    821,256.60x = 388,626,151,417.74
  5. Step 5: Solve for x
    x = 388,626,151,417.74/821,256.60
  6. Step 6: Final answer
    x = 473,209.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.