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Finding the Fourth Proportional to 312,812.10, 469,218.15 and 155,348.10

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Solution

The fourth proportional to 312,812.10, 469,218.15 and 155,348.10 is: 233,022.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,812.10 : 469,218.15 = 155,348.10 : x
  2. Step 2: Convert to fraction form
    312,812.10/469,218.15 = 155,348.10/x
  3. Step 3: Cross multiply
    312,812.10x = 469,218.15 × 155,348.10
  4. Step 4: Simplify right side
    312,812.10x = 72,892,148,088.02
  5. Step 5: Solve for x
    x = 72,892,148,088.02/312,812.10
  6. Step 6: Final answer
    x = 233,022.15

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Similar ratio
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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.