Home / 1,543,782.81-2,128,814.13-1,220,981.61

Finding the Fourth Proportional to 1,543,782.81, 2,128,814.13 and 1,220,981.61

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Solution

The fourth proportional to 1,543,782.81, 2,128,814.13 and 1,220,981.61 is: 1,683,684.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,543,782.81 : 2,128,814.13 = 1,220,981.61 : x
  2. Step 2: Convert to fraction form
    1,543,782.81/2,128,814.13 = 1,220,981.61/x
  3. Step 3: Cross multiply
    1,543,782.81x = 2,128,814.13 × 1,220,981.61
  4. Step 4: Simplify right side
    1,543,782.81x = 2,599,242,903,838.15
  5. Step 5: Solve for x
    x = 2,599,242,903,838.15/1,543,782.81
  6. Step 6: Final answer
    x = 1,683,684.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.