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Finding the Fourth Proportional to 991,800.64, 1,488,334.56 and 360,654.40

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Solution

The fourth proportional to 991,800.64, 1,488,334.56 and 360,654.40 is: 541,212.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,800.64 : 1,488,334.56 = 360,654.40 : x
  2. Step 2: Convert to fraction form
    991,800.64/1,488,334.56 = 360,654.40/x
  3. Step 3: Cross multiply
    991,800.64x = 1,488,334.56 × 360,654.40
  4. Step 4: Simplify right side
    991,800.64x = 536,774,407,736.06
  5. Step 5: Solve for x
    x = 536,774,407,736.06/991,800.64
  6. Step 6: Final answer
    x = 541,212.00

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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.