Home / 760,139.80-1,139,940.90-261,387.80

Finding the Fourth Proportional to 760,139.80, 1,139,940.90 and 261,387.80

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Solution

The fourth proportional to 760,139.80, 1,139,940.90 and 261,387.80 is: 391,989.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    760,139.80 : 1,139,940.90 = 261,387.80 : x
  2. Step 2: Convert to fraction form
    760,139.80/1,139,940.90 = 261,387.80/x
  3. Step 3: Cross multiply
    760,139.80x = 1,139,940.90 × 261,387.80
  4. Step 4: Simplify right side
    760,139.80x = 297,966,643,981.02
  5. Step 5: Solve for x
    x = 297,966,643,981.02/760,139.80
  6. Step 6: Final answer
    x = 391,989.27

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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.