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Finding the Fourth Proportional to 391,522.41, 540,352.31 and 221,762.25

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Solution

The fourth proportional to 391,522.41, 540,352.31 and 221,762.25 is: 306,061.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,522.41 : 540,352.31 = 221,762.25 : x
  2. Step 2: Convert to fraction form
    391,522.41/540,352.31 = 221,762.25/x
  3. Step 3: Cross multiply
    391,522.41x = 540,352.31 × 221,762.25
  4. Step 4: Simplify right side
    391,522.41x = 119,829,742,949.49
  5. Step 5: Solve for x
    x = 119,829,742,949.49/391,522.41
  6. Step 6: Final answer
    x = 306,061.01

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1.5x scale

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.