Home / 420,969.02-631,248.86-140,391.50

Finding the Fourth Proportional to 420,969.02, 631,248.86 and 140,391.50

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Solution

The fourth proportional to 420,969.02, 631,248.86 and 140,391.50 is: 210,518.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,969.02 : 631,248.86 = 140,391.50 : x
  2. Step 2: Convert to fraction form
    420,969.02/631,248.86 = 140,391.50/x
  3. Step 3: Cross multiply
    420,969.02x = 631,248.86 × 140,391.50
  4. Step 4: Simplify right side
    420,969.02x = 88,621,974,328.69
  5. Step 5: Solve for x
    x = 88,621,974,328.69/420,969.02
  6. Step 6: Final answer
    x = 210,518.99

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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.