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Finding the Fourth Proportional to 352,045.80, 528,068.70 and 212,077.80

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Solution

The fourth proportional to 352,045.80, 528,068.70 and 212,077.80 is: 318,116.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,045.80 : 528,068.70 = 212,077.80 : x
  2. Step 2: Convert to fraction form
    352,045.80/528,068.70 = 212,077.80/x
  3. Step 3: Cross multiply
    352,045.80x = 528,068.70 × 212,077.80
  4. Step 4: Simplify right side
    352,045.80x = 111,991,648,144.86
  5. Step 5: Solve for x
    x = 111,991,648,144.86/352,045.80
  6. Step 6: Final answer
    x = 318,116.70

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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.