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Finding the Fourth Proportional to 528,633.16, 729,181.94 and 313,621

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Solution

The fourth proportional to 528,633.16, 729,181.94 and 313,621 is: 432,600.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,633.16 : 729,181.94 = 313,621 : x
  2. Step 2: Convert to fraction form
    528,633.16/729,181.94 = 313,621/x
  3. Step 3: Cross multiply
    528,633.16x = 729,181.94 × 313,621
  4. Step 4: Simplify right side
    528,633.16x = 228,686,769,204.74
  5. Step 5: Solve for x
    x = 228,686,769,204.74/528,633.16
  6. Step 6: Final answer
    x = 432,600.12

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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.