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Finding the Fourth Proportional to 690,778.80, 953,323.56 and 384,875.28

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Solution

The fourth proportional to 690,778.80, 953,323.56 and 384,875.28 is: 531,155.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,778.80 : 953,323.56 = 384,875.28 : x
  2. Step 2: Convert to fraction form
    690,778.80/953,323.56 = 384,875.28/x
  3. Step 3: Cross multiply
    690,778.80x = 953,323.56 × 384,875.28
  4. Step 4: Simplify right side
    690,778.80x = 366,910,672,085.60
  5. Step 5: Solve for x
    x = 366,910,672,085.60/690,778.80
  6. Step 6: Final answer
    x = 531,155.08

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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.