Home / 420,971.12-631,526.44-140,574.32

Finding the Fourth Proportional to 420,971.12, 631,526.44 and 140,574.32

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Solution

The fourth proportional to 420,971.12, 631,526.44 and 140,574.32 is: 210,884.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,971.12 : 631,526.44 = 140,574.32 : x
  2. Step 2: Convert to fraction form
    420,971.12/631,526.44 = 140,574.32/x
  3. Step 3: Cross multiply
    420,971.12x = 631,526.44 × 140,574.32
  4. Step 4: Simplify right side
    420,971.12x = 88,776,399,865.02
  5. Step 5: Solve for x
    x = 88,776,399,865.02/420,971.12
  6. Step 6: Final answer
    x = 210,884.77

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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.