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Finding the Fourth Proportional to 660,423.90, 911,481.30 and 370,055.10

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Solution

The fourth proportional to 660,423.90, 911,481.30 and 370,055.10 is: 510,730.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,423.90 : 911,481.30 = 370,055.10 : x
  2. Step 2: Convert to fraction form
    660,423.90/911,481.30 = 370,055.10/x
  3. Step 3: Cross multiply
    660,423.90x = 911,481.30 × 370,055.10
  4. Step 4: Simplify right side
    660,423.90x = 337,298,303,619.63
  5. Step 5: Solve for x
    x = 337,298,303,619.63/660,423.90
  6. Step 6: Final answer
    x = 510,730.01

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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.