Home / 1,429,780.69-1,973,090.21-776,400.90

Finding the Fourth Proportional to 1,429,780.69, 1,973,090.21 and 776,400.90

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Solution

The fourth proportional to 1,429,780.69, 1,973,090.21 and 776,400.90 is: 1,071,429.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,429,780.69 : 1,973,090.21 = 776,400.90 : x
  2. Step 2: Convert to fraction form
    1,429,780.69/1,973,090.21 = 776,400.90/x
  3. Step 3: Cross multiply
    1,429,780.69x = 1,973,090.21 × 776,400.90
  4. Step 4: Simplify right side
    1,429,780.69x = 1,531,909,003,544.10
  5. Step 5: Solve for x
    x = 1,531,909,003,544.10/1,429,780.69
  6. Step 6: Final answer
    x = 1,071,429.35

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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.