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Finding the Fourth Proportional to 611,012.31, 916,399.80 and 307,325.49

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Solution

The fourth proportional to 611,012.31, 916,399.80 and 307,325.49 is: 460,928.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,012.31 : 916,399.80 = 307,325.49 : x
  2. Step 2: Convert to fraction form
    611,012.31/916,399.80 = 307,325.49/x
  3. Step 3: Cross multiply
    611,012.31x = 916,399.80 × 307,325.49
  4. Step 4: Simplify right side
    611,012.31x = 281,633,017,570.90
  5. Step 5: Solve for x
    x = 281,633,017,570.90/611,012.31
  6. Step 6: Final answer
    x = 460,928.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.