Home / 760,140.80-1,139,942.40-261,388.80

Finding the Fourth Proportional to 760,140.80, 1,139,942.40 and 261,388.80

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Solution

The fourth proportional to 760,140.80, 1,139,942.40 and 261,388.80 is: 391,990.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    760,140.80 : 1,139,942.40 = 261,388.80 : x
  2. Step 2: Convert to fraction form
    760,140.80/1,139,942.40 = 261,388.80/x
  3. Step 3: Cross multiply
    760,140.80x = 1,139,942.40 × 261,388.80
  4. Step 4: Simplify right side
    760,140.80x = 297,968,176,005.12
  5. Step 5: Solve for x
    x = 297,968,176,005.12/760,140.80
  6. Step 6: Final answer
    x = 391,990.77

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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.