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Finding the Fourth Proportional to 518,485.80, 776,999.70 and 412,051.80

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Solution

The fourth proportional to 518,485.80, 776,999.70 and 412,051.80 is: 617,498.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,485.80 : 776,999.70 = 412,051.80 : x
  2. Step 2: Convert to fraction form
    518,485.80/776,999.70 = 412,051.80/x
  3. Step 3: Cross multiply
    518,485.80x = 776,999.70 × 412,051.80
  4. Step 4: Simplify right side
    518,485.80x = 320,164,124,984.46
  5. Step 5: Solve for x
    x = 320,164,124,984.46/518,485.80
  6. Step 6: Final answer
    x = 617,498.35

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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.