Home / 1,390,188.56-1,918,639.36-778,573.76

Finding the Fourth Proportional to 1,390,188.56, 1,918,639.36 and 778,573.76

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Solution

The fourth proportional to 1,390,188.56, 1,918,639.36 and 778,573.76 is: 1,074,532.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,188.56 : 1,918,639.36 = 778,573.76 : x
  2. Step 2: Convert to fraction form
    1,390,188.56/1,918,639.36 = 778,573.76/x
  3. Step 3: Cross multiply
    1,390,188.56x = 1,918,639.36 × 778,573.76
  4. Step 4: Simplify right side
    1,390,188.56x = 1,493,802,260,599.19
  5. Step 5: Solve for x
    x = 1,493,802,260,599.19/1,390,188.56
  6. Step 6: Final answer
    x = 1,074,532.12

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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.