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Finding the Fourth Proportional to 318,485.58, 439,580.79 and 249,437.58

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Solution

The fourth proportional to 318,485.58, 439,580.79 and 249,437.58 is: 344,279.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,485.58 : 439,580.79 = 249,437.58 : x
  2. Step 2: Convert to fraction form
    318,485.58/439,580.79 = 249,437.58/x
  3. Step 3: Cross multiply
    318,485.58x = 439,580.79 × 249,437.58
  4. Step 4: Simplify right side
    318,485.58x = 109,647,968,472.09
  5. Step 5: Solve for x
    x = 109,647,968,472.09/318,485.58
  6. Step 6: Final answer
    x = 344,279.22

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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.