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Finding the Fourth Proportional to 399,153.38, 550,831.68 and 272,051.01

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Solution

The fourth proportional to 399,153.38, 550,831.68 and 272,051.01 is: 375,430.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,153.38 : 550,831.68 = 272,051.01 : x
  2. Step 2: Convert to fraction form
    399,153.38/550,831.68 = 272,051.01/x
  3. Step 3: Cross multiply
    399,153.38x = 550,831.68 × 272,051.01
  4. Step 4: Simplify right side
    399,153.38x = 149,854,314,884.00
  5. Step 5: Solve for x
    x = 149,854,314,884.00/399,153.38
  6. Step 6: Final answer
    x = 375,430.41

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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.