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Finding the Fourth Proportional to 528,606.20, 791,289.30 and 291,222.20

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Solution

The fourth proportional to 528,606.20, 791,289.30 and 291,222.20 is: 435,940.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,606.20 : 791,289.30 = 291,222.20 : x
  2. Step 2: Convert to fraction form
    528,606.20/791,289.30 = 291,222.20/x
  3. Step 3: Cross multiply
    528,606.20x = 791,289.30 × 291,222.20
  4. Step 4: Simplify right side
    528,606.20x = 230,441,010,782.46
  5. Step 5: Solve for x
    x = 230,441,010,782.46/528,606.20
  6. Step 6: Final answer
    x = 435,940.80

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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.