Home / 780,043.20-1,170,064.80-644,740.80

Finding the Fourth Proportional to 780,043.20, 1,170,064.80 and 644,740.80

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Solution

The fourth proportional to 780,043.20, 1,170,064.80 and 644,740.80 is: 967,111.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,043.20 : 1,170,064.80 = 644,740.80 : x
  2. Step 2: Convert to fraction form
    780,043.20/1,170,064.80 = 644,740.80/x
  3. Step 3: Cross multiply
    780,043.20x = 1,170,064.80 × 644,740.80
  4. Step 4: Simplify right side
    780,043.20x = 754,388,515,203.84
  5. Step 5: Solve for x
    x = 754,388,515,203.84/780,043.20
  6. Step 6: Final answer
    x = 967,111.20

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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.