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Finding the Fourth Proportional to 690,779.80, 953,324.94 and 384,876.28

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Solution

The fourth proportional to 690,779.80, 953,324.94 and 384,876.28 is: 531,156.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,779.80 : 953,324.94 = 384,876.28 : x
  2. Step 2: Convert to fraction form
    690,779.80/953,324.94 = 384,876.28/x
  3. Step 3: Cross multiply
    690,779.80x = 953,324.94 × 384,876.28
  4. Step 4: Simplify right side
    690,779.80x = 366,912,156,538.42
  5. Step 5: Solve for x
    x = 366,912,156,538.42/690,779.80
  6. Step 6: Final answer
    x = 531,156.46

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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.