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Finding the Fourth Proportional to 518,689.60, 779,200.80 and 498,860.80

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Solution

The fourth proportional to 518,689.60, 779,200.80 and 498,860.80 is: 749,413.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,689.60 : 779,200.80 = 498,860.80 : x
  2. Step 2: Convert to fraction form
    518,689.60/779,200.80 = 498,860.80/x
  3. Step 3: Cross multiply
    518,689.60x = 779,200.80 × 498,860.80
  4. Step 4: Simplify right side
    518,689.60x = 388,712,734,448.64
  5. Step 5: Solve for x
    x = 388,712,734,448.64/518,689.60
  6. Step 6: Final answer
    x = 749,413.01

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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.