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Finding the Fourth Proportional to 318,779.09, 439,915.10 and 175,538.78

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Solution

The fourth proportional to 318,779.09, 439,915.10 and 175,538.78 is: 242,243.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,779.09 : 439,915.10 = 175,538.78 : x
  2. Step 2: Convert to fraction form
    318,779.09/439,915.10 = 175,538.78/x
  3. Step 3: Cross multiply
    318,779.09x = 439,915.10 × 175,538.78
  4. Step 4: Simplify right side
    318,779.09x = 77,222,156,880.31
  5. Step 5: Solve for x
    x = 77,222,156,880.31/318,779.09
  6. Step 6: Final answer
    x = 242,243.49

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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.