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Finding the Fourth Proportional to 873,900.64, 1,311,360.48 and 368,430.72

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Solution

The fourth proportional to 873,900.64, 1,311,360.48 and 368,430.72 is: 552,860.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    873,900.64 : 1,311,360.48 = 368,430.72 : x
  2. Step 2: Convert to fraction form
    873,900.64/1,311,360.48 = 368,430.72/x
  3. Step 3: Cross multiply
    873,900.64x = 1,311,360.48 × 368,430.72
  4. Step 4: Simplify right side
    873,900.64x = 483,145,485,825.95
  5. Step 5: Solve for x
    x = 483,145,485,825.95/873,900.64
  6. Step 6: Final answer
    x = 552,860.89

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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.