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Finding the Fourth Proportional to 452,320.32, 681,731.72 and 389,893.90

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Solution

The fourth proportional to 452,320.32, 681,731.72 and 389,893.90 is: 587,643.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    452,320.32 : 681,731.72 = 389,893.90 : x
  2. Step 2: Convert to fraction form
    452,320.32/681,731.72 = 389,893.90/x
  3. Step 3: Cross multiply
    452,320.32x = 681,731.72 × 389,893.90
  4. Step 4: Simplify right side
    452,320.32x = 265,803,039,064.51
  5. Step 5: Solve for x
    x = 265,803,039,064.51/452,320.32
  6. Step 6: Final answer
    x = 587,643.37

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.