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Finding the Fourth Proportional to 760,080.80, 1,139,852.40 and 261,328.80

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Solution

The fourth proportional to 760,080.80, 1,139,852.40 and 261,328.80 is: 391,900.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    760,080.80 : 1,139,852.40 = 261,328.80 : x
  2. Step 2: Convert to fraction form
    760,080.80/1,139,852.40 = 261,328.80/x
  3. Step 3: Cross multiply
    760,080.80x = 1,139,852.40 × 261,328.80
  4. Step 4: Simplify right side
    760,080.80x = 297,876,259,869.12
  5. Step 5: Solve for x
    x = 297,876,259,869.12/760,080.80
  6. Step 6: Final answer
    x = 391,900.78

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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.