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Finding the Fourth Proportional to 906,328.77, 1,359,493.16 and 431,574.81

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Solution

The fourth proportional to 906,328.77, 1,359,493.16 and 431,574.81 is: 647,362.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    906,328.77 : 1,359,493.16 = 431,574.81 : x
  2. Step 2: Convert to fraction form
    906,328.77/1,359,493.16 = 431,574.81/x
  3. Step 3: Cross multiply
    906,328.77x = 1,359,493.16 × 431,574.81
  4. Step 4: Simplify right side
    906,328.77x = 586,723,000,065.43
  5. Step 5: Solve for x
    x = 586,723,000,065.43/906,328.77
  6. Step 6: Final answer
    x = 647,362.22

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Similar ratio
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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.