Home / 420,970.32-631,477.35-210,537.18

Finding the Fourth Proportional to 420,970.32, 631,477.35 and 210,537.18

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Solution

The fourth proportional to 420,970.32, 631,477.35 and 210,537.18 is: 315,816.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,970.32 : 631,477.35 = 210,537.18 : x
  2. Step 2: Convert to fraction form
    420,970.32/631,477.35 = 210,537.18/x
  3. Step 3: Cross multiply
    420,970.32x = 631,477.35 × 210,537.18
  4. Step 4: Simplify right side
    420,970.32x = 132,949,460,502.87
  5. Step 5: Solve for x
    x = 132,949,460,502.87/420,970.32
  6. Step 6: Final answer
    x = 315,816.71

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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.