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Finding the Fourth Proportional to 528,129.05, 728,798.41 and 313,140.47

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Solution

The fourth proportional to 528,129.05, 728,798.41 and 313,140.47 is: 432,122.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,129.05 : 728,798.41 = 313,140.47 : x
  2. Step 2: Convert to fraction form
    528,129.05/728,798.41 = 313,140.47/x
  3. Step 3: Cross multiply
    528,129.05x = 728,798.41 × 313,140.47
  4. Step 4: Simplify right side
    528,129.05x = 228,216,274,037.81
  5. Step 5: Solve for x
    x = 228,216,274,037.81/528,129.05
  6. Step 6: Final answer
    x = 432,122.18

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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.