Home / 436,023.80-655,785.30-390,534.20

Finding the Fourth Proportional to 436,023.80, 655,785.30 and 390,534.20

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Solution

The fourth proportional to 436,023.80, 655,785.30 and 390,534.20 is: 587,368.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,023.80 : 655,785.30 = 390,534.20 : x
  2. Step 2: Convert to fraction form
    436,023.80/655,785.30 = 390,534.20/x
  3. Step 3: Cross multiply
    436,023.80x = 655,785.30 × 390,534.20
  4. Step 4: Simplify right side
    436,023.80x = 256,106,587,507.26
  5. Step 5: Solve for x
    x = 256,106,587,507.26/436,023.80
  6. Step 6: Final answer
    x = 587,368.37

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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.