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Finding the Fourth Proportional to 528,643.50, 728,991.79 and 452,415.61

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Solution

The fourth proportional to 528,643.50, 728,991.79 and 452,415.61 is: 623,874.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,643.50 : 728,991.79 = 452,415.61 : x
  2. Step 2: Convert to fraction form
    528,643.50/728,991.79 = 452,415.61/x
  3. Step 3: Cross multiply
    528,643.50x = 728,991.79 × 452,415.61
  4. Step 4: Simplify right side
    528,643.50x = 329,807,265,357.84
  5. Step 5: Solve for x
    x = 329,807,265,357.84/528,643.50
  6. Step 6: Final answer
    x = 623,874.63

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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.