Home / 421,520.40-631,984.95-155,246.40

Finding the Fourth Proportional to 421,520.40, 631,984.95 and 155,246.40

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Solution

The fourth proportional to 421,520.40, 631,984.95 and 155,246.40 is: 232,760.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,520.40 : 631,984.95 = 155,246.40 : x
  2. Step 2: Convert to fraction form
    421,520.40/631,984.95 = 155,246.40/x
  3. Step 3: Cross multiply
    421,520.40x = 631,984.95 × 155,246.40
  4. Step 4: Simplify right side
    421,520.40x = 98,113,388,341.68
  5. Step 5: Solve for x
    x = 98,113,388,341.68/421,520.40
  6. Step 6: Final answer
    x = 232,760.71

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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.