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Finding the Fourth Proportional to 620.19, 856.07 and 433.69

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Solution

The fourth proportional to 620.19, 856.07 and 433.69 is: 598.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.19 : 856.07 = 433.69 : x
  2. Step 2: Convert to fraction form
    620.19/856.07 = 433.69/x
  3. Step 3: Cross multiply
    620.19x = 856.07 × 433.69
  4. Step 4: Simplify right side
    620.19x = 371,266.32
  5. Step 5: Solve for x
    x = 371,266.32/620.19
  6. Step 6: Final answer
    x = 598.63

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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.