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Finding the Fourth Proportional to 916,903.80, 1,375,355.70 and 384,247.80

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Solution

The fourth proportional to 916,903.80, 1,375,355.70 and 384,247.80 is: 576,371.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    916,903.80 : 1,375,355.70 = 384,247.80 : x
  2. Step 2: Convert to fraction form
    916,903.80/1,375,355.70 = 384,247.80/x
  3. Step 3: Cross multiply
    916,903.80x = 1,375,355.70 × 384,247.80
  4. Step 4: Simplify right side
    916,903.80x = 528,477,401,942.46
  5. Step 5: Solve for x
    x = 528,477,401,942.46/916,903.80
  6. Step 6: Final answer
    x = 576,371.70

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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.