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Finding the Fourth Proportional to 303,074.40, 455,267.70 and 291,920.70

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Solution

The fourth proportional to 303,074.40, 455,267.70 and 291,920.70 is: 438,513.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,074.40 : 455,267.70 = 291,920.70 : x
  2. Step 2: Convert to fraction form
    303,074.40/455,267.70 = 291,920.70/x
  3. Step 3: Cross multiply
    303,074.40x = 455,267.70 × 291,920.70
  4. Step 4: Simplify right side
    303,074.40x = 132,902,065,671.39
  5. Step 5: Solve for x
    x = 132,902,065,671.39/303,074.40
  6. Step 6: Final answer
    x = 438,513.00

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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.