Home / 210,629.40-315,944.10-209,317.20

Finding the Fourth Proportional to 210,629.40, 315,944.10 and 209,317.20

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Solution

The fourth proportional to 210,629.40, 315,944.10 and 209,317.20 is: 313,975.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,629.40 : 315,944.10 = 209,317.20 : x
  2. Step 2: Convert to fraction form
    210,629.40/315,944.10 = 209,317.20/x
  3. Step 3: Cross multiply
    210,629.40x = 315,944.10 × 209,317.20
  4. Step 4: Simplify right side
    210,629.40x = 66,132,534,368.52
  5. Step 5: Solve for x
    x = 66,132,534,368.52/210,629.40
  6. Step 6: Final answer
    x = 313,975.80

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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.