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Finding the Fourth Proportional to 448,762.19, 673,138.13 and 128,921.90

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Solution

The fourth proportional to 448,762.19, 673,138.13 and 128,921.90 is: 193,381.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,762.19 : 673,138.13 = 128,921.90 : x
  2. Step 2: Convert to fraction form
    448,762.19/673,138.13 = 128,921.90/x
  3. Step 3: Cross multiply
    448,762.19x = 673,138.13 × 128,921.90
  4. Step 4: Simplify right side
    448,762.19x = 86,782,242,671.75
  5. Step 5: Solve for x
    x = 86,782,242,671.75/448,762.19
  6. Step 6: Final answer
    x = 193,381.36

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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.