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Finding the Fourth Proportional to 621,505.31, 931,986.24 and 313,567.91

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Solution

The fourth proportional to 621,505.31, 931,986.24 and 313,567.91 is: 470,214.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,505.31 : 931,986.24 = 313,567.91 : x
  2. Step 2: Convert to fraction form
    621,505.31/931,986.24 = 313,567.91/x
  3. Step 3: Cross multiply
    621,505.31x = 931,986.24 × 313,567.91
  4. Step 4: Simplify right side
    621,505.31x = 292,240,972,765.63
  5. Step 5: Solve for x
    x = 292,240,972,765.63/621,505.31
  6. Step 6: Final answer
    x = 470,214.77

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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.