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Finding the Fourth Proportional to 561,113.63, 774,336.80 and 306,465.42

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Solution

The fourth proportional to 561,113.63, 774,336.80 and 306,465.42 is: 422,922.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,113.63 : 774,336.80 = 306,465.42 : x
  2. Step 2: Convert to fraction form
    561,113.63/774,336.80 = 306,465.42/x
  3. Step 3: Cross multiply
    561,113.63x = 774,336.80 × 306,465.42
  4. Step 4: Simplify right side
    561,113.63x = 237,307,453,399.62
  5. Step 5: Solve for x
    x = 237,307,453,399.62/561,113.63
  6. Step 6: Final answer
    x = 422,922.28

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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.