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Finding the Fourth Proportional to 561,436.05, 774,783.72 and 306,787.23

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Solution

The fourth proportional to 561,436.05, 774,783.72 and 306,787.23 is: 423,367.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,436.05 : 774,783.72 = 306,787.23 : x
  2. Step 2: Convert to fraction form
    561,436.05/774,783.72 = 306,787.23/x
  3. Step 3: Cross multiply
    561,436.05x = 774,783.72 × 306,787.23
  4. Step 4: Simplify right side
    561,436.05x = 237,693,751,307.90
  5. Step 5: Solve for x
    x = 237,693,751,307.90/561,436.05
  6. Step 6: Final answer
    x = 423,367.45

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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.