Home / 1,238,865.80-1,710,367.68-780,373.40

Finding the Fourth Proportional to 1,238,865.80, 1,710,367.68 and 780,373.40

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Solution

The fourth proportional to 1,238,865.80, 1,710,367.68 and 780,373.40 is: 1,077,376.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,238,865.80 : 1,710,367.68 = 780,373.40 : x
  2. Step 2: Convert to fraction form
    1,238,865.80/1,710,367.68 = 780,373.40/x
  3. Step 3: Cross multiply
    1,238,865.80x = 1,710,367.68 × 780,373.40
  4. Step 4: Simplify right side
    1,238,865.80x = 1,334,725,441,691.71
  5. Step 5: Solve for x
    x = 1,334,725,441,691.71/1,238,865.80
  6. Step 6: Final answer
    x = 1,077,376.94

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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.