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Finding the Fourth Proportional to 680,813.36, 939,485.64 and 374,830.16

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Solution

The fourth proportional to 680,813.36, 939,485.64 and 374,830.16 is: 517,245.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,813.36 : 939,485.64 = 374,830.16 : x
  2. Step 2: Convert to fraction form
    680,813.36/939,485.64 = 374,830.16/x
  3. Step 3: Cross multiply
    680,813.36x = 939,485.64 × 374,830.16
  4. Step 4: Simplify right side
    680,813.36x = 352,147,552,758.90
  5. Step 5: Solve for x
    x = 352,147,552,758.90/680,813.36
  6. Step 6: Final answer
    x = 517,245.36

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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.