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Finding the Fourth Proportional to 318,779.81, 439,913.95 and 175,538.69

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Solution

The fourth proportional to 318,779.81, 439,913.95 and 175,538.69 is: 242,242.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,779.81 : 439,913.95 = 175,538.69 : x
  2. Step 2: Convert to fraction form
    318,779.81/439,913.95 = 175,538.69/x
  3. Step 3: Cross multiply
    318,779.81x = 439,913.95 × 175,538.69
  4. Step 4: Simplify right side
    318,779.81x = 77,221,918,495.73
  5. Step 5: Solve for x
    x = 77,221,918,495.73/318,779.81
  6. Step 6: Final answer
    x = 242,242.19

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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.