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Finding the Fourth Proportional to 699,079.19, 964,720.08 and 393,155.46

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Solution

The fourth proportional to 699,079.19, 964,720.08 and 393,155.46 is: 542,549.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,079.19 : 964,720.08 = 393,155.46 : x
  2. Step 2: Convert to fraction form
    699,079.19/964,720.08 = 393,155.46/x
  3. Step 3: Cross multiply
    699,079.19x = 964,720.08 × 393,155.46
  4. Step 4: Simplify right side
    699,079.19x = 379,284,966,823.64
  5. Step 5: Solve for x
    x = 379,284,966,823.64/699,079.19
  6. Step 6: Final answer
    x = 542,549.36

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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.