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Finding the Fourth Proportional to 210,284.80, 315,427.20 and 168,812.80

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Solution

The fourth proportional to 210,284.80, 315,427.20 and 168,812.80 is: 253,219.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,284.80 : 315,427.20 = 168,812.80 : x
  2. Step 2: Convert to fraction form
    210,284.80/315,427.20 = 168,812.80/x
  3. Step 3: Cross multiply
    210,284.80x = 315,427.20 × 168,812.80
  4. Step 4: Simplify right side
    210,284.80x = 53,248,148,828.16
  5. Step 5: Solve for x
    x = 53,248,148,828.16/210,284.80
  6. Step 6: Final answer
    x = 253,219.20

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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.