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Finding the Fourth Proportional to 723,129.16, 997,813.44 and 400,839.16

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Solution

The fourth proportional to 723,129.16, 997,813.44 and 400,839.16 is: 553,099.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    723,129.16 : 997,813.44 = 400,839.16 : x
  2. Step 2: Convert to fraction form
    723,129.16/997,813.44 = 400,839.16/x
  3. Step 3: Cross multiply
    723,129.16x = 997,813.44 × 400,839.16
  4. Step 4: Simplify right side
    723,129.16x = 399,962,701,126.31
  5. Step 5: Solve for x
    x = 399,962,701,126.31/723,129.16
  6. Step 6: Final answer
    x = 553,099.95

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1.5x scale

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.