Home / 1,388,207.70-1,915,824.15-776,417.40

Finding the Fourth Proportional to 1,388,207.70, 1,915,824.15 and 776,417.40

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Solution

The fourth proportional to 1,388,207.70, 1,915,824.15 and 776,417.40 is: 1,071,510.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,207.70 : 1,915,824.15 = 776,417.40 : x
  2. Step 2: Convert to fraction form
    1,388,207.70/1,915,824.15 = 776,417.40/x
  3. Step 3: Cross multiply
    1,388,207.70x = 1,915,824.15 × 776,417.40
  4. Step 4: Simplify right side
    1,388,207.70x = 1,487,479,205,400.21
  5. Step 5: Solve for x
    x = 1,487,479,205,400.21/1,388,207.70
  6. Step 6: Final answer
    x = 1,071,510.56

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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.