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Finding the Fourth Proportional to 509,823.79, 703,704.72 and 316,290.49

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Solution

The fourth proportional to 509,823.79, 703,704.72 and 316,290.49 is: 436,572.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,823.79 : 703,704.72 = 316,290.49 : x
  2. Step 2: Convert to fraction form
    509,823.79/703,704.72 = 316,290.49/x
  3. Step 3: Cross multiply
    509,823.79x = 703,704.72 × 316,290.49
  4. Step 4: Simplify right side
    509,823.79x = 222,575,110,704.11
  5. Step 5: Solve for x
    x = 222,575,110,704.11/509,823.79
  6. Step 6: Final answer
    x = 436,572.63

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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.