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Finding the Fourth Proportional to 699,782.72, 965,832 and 438,259.28

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Solution

The fourth proportional to 699,782.72, 965,832 and 438,259.28 is: 604,880.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,782.72 : 965,832 = 438,259.28 : x
  2. Step 2: Convert to fraction form
    699,782.72/965,832 = 438,259.28/x
  3. Step 3: Cross multiply
    699,782.72x = 965,832 × 438,259.28
  4. Step 4: Simplify right side
    699,782.72x = 423,284,836,920.96
  5. Step 5: Solve for x
    x = 423,284,836,920.96/699,782.72
  6. Step 6: Final answer
    x = 604,880.38

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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.