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Finding the Fourth Proportional to 435,485.34, 653,412.38 and 211,012.88

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Solution

The fourth proportional to 435,485.34, 653,412.38 and 211,012.88 is: 316,608.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    435,485.34 : 653,412.38 = 211,012.88 : x
  2. Step 2: Convert to fraction form
    435,485.34/653,412.38 = 211,012.88/x
  3. Step 3: Cross multiply
    435,485.34x = 653,412.38 × 211,012.88
  4. Step 4: Simplify right side
    435,485.34x = 137,878,428,131.45
  5. Step 5: Solve for x
    x = 137,878,428,131.45/435,485.34
  6. Step 6: Final answer
    x = 316,608.66

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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.