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Finding the Fourth Proportional to 511,672.21, 706,019.55 and 328,071.34

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Solution

The fourth proportional to 511,672.21, 706,019.55 and 328,071.34 is: 452,681.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    511,672.21 : 706,019.55 = 328,071.34 : x
  2. Step 2: Convert to fraction form
    511,672.21/706,019.55 = 328,071.34/x
  3. Step 3: Cross multiply
    511,672.21x = 706,019.55 × 328,071.34
  4. Step 4: Simplify right side
    511,672.21x = 231,624,779,834.70
  5. Step 5: Solve for x
    x = 231,624,779,834.70/511,672.21
  6. Step 6: Final answer
    x = 452,681.96

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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.