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Finding the Fourth Proportional to 528,325.56, 728,897.94 and 347,135.04

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Solution

The fourth proportional to 528,325.56, 728,897.94 and 347,135.04 is: 478,920.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,325.56 : 728,897.94 = 347,135.04 : x
  2. Step 2: Convert to fraction form
    528,325.56/728,897.94 = 347,135.04/x
  3. Step 3: Cross multiply
    528,325.56x = 728,897.94 × 347,135.04
  4. Step 4: Simplify right side
    528,325.56x = 253,026,015,557.82
  5. Step 5: Solve for x
    x = 253,026,015,557.82/528,325.56
  6. Step 6: Final answer
    x = 478,920.64

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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.