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Finding the Fourth Proportional to 545,317.78, 752,343.78 and 315,749.78

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Solution

The fourth proportional to 545,317.78, 752,343.78 and 315,749.78 is: 435,621.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,317.78 : 752,343.78 = 315,749.78 : x
  2. Step 2: Convert to fraction form
    545,317.78/752,343.78 = 315,749.78/x
  3. Step 3: Cross multiply
    545,317.78x = 752,343.78 × 315,749.78
  4. Step 4: Simplify right side
    545,317.78x = 237,552,383,019.37
  5. Step 5: Solve for x
    x = 237,552,383,019.37/545,317.78
  6. Step 6: Final answer
    x = 435,621.93

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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.