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Finding the Fourth Proportional to 611,320.20, 916,980.30 and 168,088.20

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Solution

The fourth proportional to 611,320.20, 916,980.30 and 168,088.20 is: 252,132.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,320.20 : 916,980.30 = 168,088.20 : x
  2. Step 2: Convert to fraction form
    611,320.20/916,980.30 = 168,088.20/x
  3. Step 3: Cross multiply
    611,320.20x = 916,980.30 × 168,088.20
  4. Step 4: Simplify right side
    611,320.20x = 154,133,568,062.46
  5. Step 5: Solve for x
    x = 154,133,568,062.46/611,320.20
  6. Step 6: Final answer
    x = 252,132.30

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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.