Home / 1,389,332.34-1,917,359.43-777,479.82

Finding the Fourth Proportional to 1,389,332.34, 1,917,359.43 and 777,479.82

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Solution

The fourth proportional to 1,389,332.34, 1,917,359.43 and 777,479.82 is: 1,072,967.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,332.34 : 1,917,359.43 = 777,479.82 : x
  2. Step 2: Convert to fraction form
    1,389,332.34/1,917,359.43 = 777,479.82/x
  3. Step 3: Cross multiply
    1,389,332.34x = 1,917,359.43 × 777,479.82
  4. Step 4: Simplify right side
    1,389,332.34x = 1,490,708,264,511.70
  5. Step 5: Solve for x
    x = 1,490,708,264,511.70/1,389,332.34
  6. Step 6: Final answer
    x = 1,072,967.37

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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.