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Finding the Fourth Proportional to 351,775.22, 528,368.86 and 209,897.30

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Solution

The fourth proportional to 351,775.22, 528,368.86 and 209,897.30 is: 315,267.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,775.22 : 528,368.86 = 209,897.30 : x
  2. Step 2: Convert to fraction form
    351,775.22/528,368.86 = 209,897.30/x
  3. Step 3: Cross multiply
    351,775.22x = 528,368.86 × 209,897.30
  4. Step 4: Simplify right side
    351,775.22x = 110,903,197,118.08
  5. Step 5: Solve for x
    x = 110,903,197,118.08/351,775.22
  6. Step 6: Final answer
    x = 315,267.22

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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.