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Finding the Fourth Proportional to 319,458.60, 479,187.90 and 97,813.80

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Solution

The fourth proportional to 319,458.60, 479,187.90 and 97,813.80 is: 146,720.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,458.60 : 479,187.90 = 97,813.80 : x
  2. Step 2: Convert to fraction form
    319,458.60/479,187.90 = 97,813.80/x
  3. Step 3: Cross multiply
    319,458.60x = 479,187.90 × 97,813.80
  4. Step 4: Simplify right side
    319,458.60x = 46,871,189,413.02
  5. Step 5: Solve for x
    x = 46,871,189,413.02/319,458.60
  6. Step 6: Final answer
    x = 146,720.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.