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Finding the Fourth Proportional to 665,886.90, 918,923.92 and 364,080.90

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Solution

The fourth proportional to 665,886.90, 918,923.92 and 364,080.90 is: 502,431.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,886.90 : 918,923.92 = 364,080.90 : x
  2. Step 2: Convert to fraction form
    665,886.90/918,923.92 = 364,080.90/x
  3. Step 3: Cross multiply
    665,886.90x = 918,923.92 × 364,080.90
  4. Step 4: Simplify right side
    665,886.90x = 334,562,647,825.13
  5. Step 5: Solve for x
    x = 334,562,647,825.13/665,886.90
  6. Step 6: Final answer
    x = 502,431.64

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1.5x scale

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.