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Finding the Fourth Proportional to 316,555.76, 436,830.36 and 173,288.36

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Solution

The fourth proportional to 316,555.76, 436,830.36 and 173,288.36 is: 239,128.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,555.76 : 436,830.36 = 173,288.36 : x
  2. Step 2: Convert to fraction form
    316,555.76/436,830.36 = 173,288.36/x
  3. Step 3: Cross multiply
    316,555.76x = 436,830.36 × 173,288.36
  4. Step 4: Simplify right side
    316,555.76x = 75,697,616,682.61
  5. Step 5: Solve for x
    x = 75,697,616,682.61/316,555.76
  6. Step 6: Final answer
    x = 239,128.86

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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.