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Finding the Fourth Proportional to 525,485.28, 725,223.21 and 321,670.89

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Solution

The fourth proportional to 525,485.28, 725,223.21 and 321,670.89 is: 443,938.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,485.28 : 725,223.21 = 321,670.89 : x
  2. Step 2: Convert to fraction form
    525,485.28/725,223.21 = 321,670.89/x
  3. Step 3: Cross multiply
    525,485.28x = 725,223.21 × 321,670.89
  4. Step 4: Simplify right side
    525,485.28x = 233,283,195,409.36
  5. Step 5: Solve for x
    x = 233,283,195,409.36/525,485.28
  6. Step 6: Final answer
    x = 443,938.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.