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Finding the Fourth Proportional to 660,744.63, 911,750.23 and 388,752.70

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Solution

The fourth proportional to 660,744.63, 911,750.23 and 388,752.70 is: 536,433.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,744.63 : 911,750.23 = 388,752.70 : x
  2. Step 2: Convert to fraction form
    660,744.63/911,750.23 = 388,752.70/x
  3. Step 3: Cross multiply
    660,744.63x = 911,750.23 × 388,752.70
  4. Step 4: Simplify right side
    660,744.63x = 354,445,363,638.12
  5. Step 5: Solve for x
    x = 354,445,363,638.12/660,744.63
  6. Step 6: Final answer
    x = 536,433.21

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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.