Home / 1,399,788.52-1,931,708.62-819,123.28

Finding the Fourth Proportional to 1,399,788.52, 1,931,708.62 and 819,123.28

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Solution

The fourth proportional to 1,399,788.52, 1,931,708.62 and 819,123.28 is: 1,130,390.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,399,788.52 : 1,931,708.62 = 819,123.28 : x
  2. Step 2: Convert to fraction form
    1,399,788.52/1,931,708.62 = 819,123.28/x
  3. Step 3: Cross multiply
    1,399,788.52x = 1,931,708.62 × 819,123.28
  4. Step 4: Simplify right side
    1,399,788.52x = 1,582,307,500,818.67
  5. Step 5: Solve for x
    x = 1,582,307,500,818.67/1,399,788.52
  6. Step 6: Final answer
    x = 1,130,390.40

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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.