Home / 1,393,358.79-1,922,681.38-781,385.61

Finding the Fourth Proportional to 1,393,358.79, 1,922,681.38 and 781,385.61

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Solution

The fourth proportional to 1,393,358.79, 1,922,681.38 and 781,385.61 is: 1,078,225.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,393,358.79 : 1,922,681.38 = 781,385.61 : x
  2. Step 2: Convert to fraction form
    1,393,358.79/1,922,681.38 = 781,385.61/x
  3. Step 3: Cross multiply
    1,393,358.79x = 1,922,681.38 × 781,385.61
  4. Step 4: Simplify right side
    1,393,358.79x = 1,502,355,562,946.94
  5. Step 5: Solve for x
    x = 1,502,355,562,946.94/1,393,358.79
  6. Step 6: Final answer
    x = 1,078,225.92

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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.