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Finding the Fourth Proportional to 710,978.64, 981,150.48 and 388,690.08

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Solution

The fourth proportional to 710,978.64, 981,150.48 and 388,690.08 is: 536,392.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,978.64 : 981,150.48 = 388,690.08 : x
  2. Step 2: Convert to fraction form
    710,978.64/981,150.48 = 388,690.08/x
  3. Step 3: Cross multiply
    710,978.64x = 981,150.48 × 388,690.08
  4. Step 4: Simplify right side
    710,978.64x = 381,363,458,563.24
  5. Step 5: Solve for x
    x = 381,363,458,563.24/710,978.64
  6. Step 6: Final answer
    x = 536,392.29

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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.