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Finding the Fourth Proportional to 398,413.80, 597,620.70 and 370,420.20

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Solution

The fourth proportional to 398,413.80, 597,620.70 and 370,420.20 is: 555,630.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,413.80 : 597,620.70 = 370,420.20 : x
  2. Step 2: Convert to fraction form
    398,413.80/597,620.70 = 370,420.20/x
  3. Step 3: Cross multiply
    398,413.80x = 597,620.70 × 370,420.20
  4. Step 4: Simplify right side
    398,413.80x = 221,370,779,218.14
  5. Step 5: Solve for x
    x = 221,370,779,218.14/398,413.80
  6. Step 6: Final answer
    x = 555,630.30

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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.