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Finding the Fourth Proportional to 525,395.23, 725,063.21 and 310,719.31

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Solution

The fourth proportional to 525,395.23, 725,063.21 and 310,719.31 is: 428,803.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,395.23 : 725,063.21 = 310,719.31 : x
  2. Step 2: Convert to fraction form
    525,395.23/725,063.21 = 310,719.31/x
  3. Step 3: Cross multiply
    525,395.23x = 725,063.21 × 310,719.31
  4. Step 4: Simplify right side
    525,395.23x = 225,291,140,317.59
  5. Step 5: Solve for x
    x = 225,291,140,317.59/525,395.23
  6. Step 6: Final answer
    x = 428,803.17

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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.