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Finding the Fourth Proportional to 316,522.90, 436,806.81 and 173,280.58

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Solution

The fourth proportional to 316,522.90, 436,806.81 and 173,280.58 is: 239,130.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,522.90 : 436,806.81 = 173,280.58 : x
  2. Step 2: Convert to fraction form
    316,522.90/436,806.81 = 173,280.58/x
  3. Step 3: Cross multiply
    316,522.90x = 436,806.81 × 173,280.58
  4. Step 4: Simplify right side
    316,522.90x = 75,690,137,384.75
  5. Step 5: Solve for x
    x = 75,690,137,384.75/316,522.90
  6. Step 6: Final answer
    x = 239,130.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.