Home / 355,385.46-490,430.16-210,243.36

Finding the Fourth Proportional to 355,385.46, 490,430.16 and 210,243.36

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Solution

The fourth proportional to 355,385.46, 490,430.16 and 210,243.36 is: 290,134.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,385.46 : 490,430.16 = 210,243.36 : x
  2. Step 2: Convert to fraction form
    355,385.46/490,430.16 = 210,243.36/x
  3. Step 3: Cross multiply
    355,385.46x = 490,430.16 × 210,243.36
  4. Step 4: Simplify right side
    355,385.46x = 103,109,684,683.74
  5. Step 5: Solve for x
    x = 103,109,684,683.74/355,385.46
  6. Step 6: Final answer
    x = 290,134.79

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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.