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Finding the Fourth Proportional to 352,573.60, 528,082.80 and 212,087.20

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Solution

The fourth proportional to 352,573.60, 528,082.80 and 212,087.20 is: 317,663.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,573.60 : 528,082.80 = 212,087.20 : x
  2. Step 2: Convert to fraction form
    352,573.60/528,082.80 = 212,087.20/x
  3. Step 3: Cross multiply
    352,573.60x = 528,082.80 × 212,087.20
  4. Step 4: Simplify right side
    352,573.60x = 111,999,602,420.16
  5. Step 5: Solve for x
    x = 111,999,602,420.16/352,573.60
  6. Step 6: Final answer
    x = 317,663.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.