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Finding the Fourth Proportional to 450,572.40, 621,368.40 and 305,399.28

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Solution

The fourth proportional to 450,572.40, 621,368.40 and 305,399.28 is: 421,165.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    450,572.40 : 621,368.40 = 305,399.28 : x
  2. Step 2: Convert to fraction form
    450,572.40/621,368.40 = 305,399.28/x
  3. Step 3: Cross multiply
    450,572.40x = 621,368.40 × 305,399.28
  4. Step 4: Simplify right side
    450,572.40x = 189,765,461,974.75
  5. Step 5: Solve for x
    x = 189,765,461,974.75/450,572.40
  6. Step 6: Final answer
    x = 421,165.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.