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Finding the Fourth Proportional to 707,040, 975,715.36 and 389,088

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Solution

The fourth proportional to 707,040, 975,715.36 and 389,088 is: 536,941.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,040 : 975,715.36 = 389,088 : x
  2. Step 2: Convert to fraction form
    707,040/975,715.36 = 389,088/x
  3. Step 3: Cross multiply
    707,040x = 975,715.36 × 389,088
  4. Step 4: Simplify right side
    707,040x = 379,639,137,991.68
  5. Step 5: Solve for x
    x = 379,639,137,991.68/707,040
  6. Step 6: Final answer
    x = 536,941.53

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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.