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Finding the Fourth Proportional to 528,128.80, 791,026.80 and 212,423.20

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Solution

The fourth proportional to 528,128.80, 791,026.80 and 212,423.20 is: 318,165.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,128.80 : 791,026.80 = 212,423.20 : x
  2. Step 2: Convert to fraction form
    528,128.80/791,026.80 = 212,423.20/x
  3. Step 3: Cross multiply
    528,128.80x = 791,026.80 × 212,423.20
  4. Step 4: Simplify right side
    528,128.80x = 168,032,444,141.76
  5. Step 5: Solve for x
    x = 168,032,444,141.76/528,128.80
  6. Step 6: Final answer
    x = 318,165.65

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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.