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Finding the Fourth Proportional to 680,438.50, 939,005.08 and 370,343.31

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Solution

The fourth proportional to 680,438.50, 939,005.08 and 370,343.31 is: 511,073.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,438.50 : 939,005.08 = 370,343.31 : x
  2. Step 2: Convert to fraction form
    680,438.50/939,005.08 = 370,343.31/x
  3. Step 3: Cross multiply
    680,438.50x = 939,005.08 × 370,343.31
  4. Step 4: Simplify right side
    680,438.50x = 347,754,249,434.02
  5. Step 5: Solve for x
    x = 347,754,249,434.02/680,438.50
  6. Step 6: Final answer
    x = 511,073.74

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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.