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Finding the Fourth Proportional to 397,969.80, 596,565.90 and 355,979.40

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Solution

The fourth proportional to 397,969.80, 596,565.90 and 355,979.40 is: 533,621.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,969.80 : 596,565.90 = 355,979.40 : x
  2. Step 2: Convert to fraction form
    397,969.80/596,565.90 = 355,979.40/x
  3. Step 3: Cross multiply
    397,969.80x = 596,565.90 × 355,979.40
  4. Step 4: Simplify right side
    397,969.80x = 212,365,171,142.46
  5. Step 5: Solve for x
    x = 212,365,171,142.46/397,969.80
  6. Step 6: Final answer
    x = 533,621.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.