Home / 1,238,861.19-1,710,361.31-780,368.79

Finding the Fourth Proportional to 1,238,861.19, 1,710,361.31 and 780,368.79

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Solution

The fourth proportional to 1,238,861.19, 1,710,361.31 and 780,368.79 is: 1,077,370.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,238,861.19 : 1,710,361.31 = 780,368.79 : x
  2. Step 2: Convert to fraction form
    1,238,861.19/1,710,361.31 = 780,368.79/x
  3. Step 3: Cross multiply
    1,238,861.19x = 1,710,361.31 × 780,368.79
  4. Step 4: Simplify right side
    1,238,861.19x = 1,334,712,582,045.67
  5. Step 5: Solve for x
    x = 1,334,712,582,045.67/1,238,861.19
  6. Step 6: Final answer
    x = 1,077,370.57

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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.