Home / 1,421,689.68-1,961,931.84-777,112.40

Finding the Fourth Proportional to 1,421,689.68, 1,961,931.84 and 777,112.40

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Solution

The fourth proportional to 1,421,689.68, 1,961,931.84 and 777,112.40 is: 1,072,415.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421,689.68 : 1,961,931.84 = 777,112.40 : x
  2. Step 2: Convert to fraction form
    1,421,689.68/1,961,931.84 = 777,112.40/x
  3. Step 3: Cross multiply
    1,421,689.68x = 1,961,931.84 × 777,112.40
  4. Step 4: Simplify right side
    1,421,689.68x = 1,524,641,560,818.82
  5. Step 5: Solve for x
    x = 1,524,641,560,818.82/1,421,689.68
  6. Step 6: Final answer
    x = 1,072,415.16

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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.