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Finding the Fourth Proportional to 485,622.24, 670,266.24 and 315,561.12

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Solution

The fourth proportional to 485,622.24, 670,266.24 and 315,561.12 is: 435,544.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,622.24 : 670,266.24 = 315,561.12 : x
  2. Step 2: Convert to fraction form
    485,622.24/670,266.24 = 315,561.12/x
  3. Step 3: Cross multiply
    485,622.24x = 670,266.24 × 315,561.12
  4. Step 4: Simplify right side
    485,622.24x = 211,509,965,392.59
  5. Step 5: Solve for x
    x = 211,509,965,392.59/485,622.24
  6. Step 6: Final answer
    x = 435,544.23

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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.