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Finding the Fourth Proportional to 692,318.52, 955,399.05 and 390,512.52

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Solution

The fourth proportional to 692,318.52, 955,399.05 and 390,512.52 is: 538,906.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,318.52 : 955,399.05 = 390,512.52 : x
  2. Step 2: Convert to fraction form
    692,318.52/955,399.05 = 390,512.52/x
  3. Step 3: Cross multiply
    692,318.52x = 955,399.05 × 390,512.52
  4. Step 4: Simplify right side
    692,318.52x = 373,095,290,621.11
  5. Step 5: Solve for x
    x = 373,095,290,621.11/692,318.52
  6. Step 6: Final answer
    x = 538,906.99

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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.