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Finding the Fourth Proportional to 660,395.64, 911,372.12 and 370,009.71

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Solution

The fourth proportional to 660,395.64, 911,372.12 and 370,009.71 is: 510,628.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,395.64 : 911,372.12 = 370,009.71 : x
  2. Step 2: Convert to fraction form
    660,395.64/911,372.12 = 370,009.71/x
  3. Step 3: Cross multiply
    660,395.64x = 911,372.12 × 370,009.71
  4. Step 4: Simplify right side
    660,395.64x = 337,216,531,973.24
  5. Step 5: Solve for x
    x = 337,216,531,973.24/660,395.64
  6. Step 6: Final answer
    x = 510,628.04

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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.