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Finding the Fourth Proportional to 660,800.16, 911,874.88 and 374,314.48

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Solution

The fourth proportional to 660,800.16, 911,874.88 and 374,314.48 is: 516,537.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,800.16 : 911,874.88 = 374,314.48 : x
  2. Step 2: Convert to fraction form
    660,800.16/911,874.88 = 374,314.48/x
  3. Step 3: Cross multiply
    660,800.16x = 911,874.88 × 374,314.48
  4. Step 4: Simplify right side
    660,800.16x = 341,327,971,532.26
  5. Step 5: Solve for x
    x = 341,327,971,532.26/660,800.16
  6. Step 6: Final answer
    x = 516,537.36

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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.