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Finding the Fourth Proportional to 691,647.36, 954,480.66 and 389,841.36

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Solution

The fourth proportional to 691,647.36, 954,480.66 and 389,841.36 is: 537,985.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,647.36 : 954,480.66 = 389,841.36 : x
  2. Step 2: Convert to fraction form
    691,647.36/954,480.66 = 389,841.36/x
  3. Step 3: Cross multiply
    691,647.36x = 954,480.66 × 389,841.36
  4. Step 4: Simplify right side
    691,647.36x = 372,096,038,588.10
  5. Step 5: Solve for x
    x = 372,096,038,588.10/691,647.36
  6. Step 6: Final answer
    x = 537,985.19

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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.