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Finding the Fourth Proportional to 210,200.40, 315,300.60 and 208,888.20

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Solution

The fourth proportional to 210,200.40, 315,300.60 and 208,888.20 is: 313,332.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,200.40 : 315,300.60 = 208,888.20 : x
  2. Step 2: Convert to fraction form
    210,200.40/315,300.60 = 208,888.20/x
  3. Step 3: Cross multiply
    210,200.40x = 315,300.60 × 208,888.20
  4. Step 4: Simplify right side
    210,200.40x = 65,862,574,792.92
  5. Step 5: Solve for x
    x = 65,862,574,792.92/210,200.40
  6. Step 6: Final answer
    x = 313,332.30

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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.