Home / 1,390,224.46-1,918,711.16-778,416.64

Finding the Fourth Proportional to 1,390,224.46, 1,918,711.16 and 778,416.64

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Solution

The fourth proportional to 1,390,224.46, 1,918,711.16 and 778,416.64 is: 1,074,327.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,224.46 : 1,918,711.16 = 778,416.64 : x
  2. Step 2: Convert to fraction form
    1,390,224.46/1,918,711.16 = 778,416.64/x
  3. Step 3: Cross multiply
    1,390,224.46x = 1,918,711.16 × 778,416.64
  4. Step 4: Simplify right side
    1,390,224.46x = 1,493,556,702,604.64
  5. Step 5: Solve for x
    x = 1,493,556,702,604.64/1,390,224.46
  6. Step 6: Final answer
    x = 1,074,327.74

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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.