Home / 1,257,228,931.10-1,886,135,191.56-428,189,756.21

Finding the Fourth Proportional to 1,257,228,931.10, 1,886,135,191.56 and 428,189,756.21

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Solution

The fourth proportional to 1,257,228,931.10, 1,886,135,191.56 and 428,189,756.21 is: 642,384,014.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,257,228,931.10 : 1,886,135,191.56 = 428,189,756.21 : x
  2. Step 2: Convert to fraction form
    1,257,228,931.10/1,886,135,191.56 = 428,189,756.21/x
  3. Step 3: Cross multiply
    1,257,228,931.10x = 1,886,135,191.56 × 428,189,756.21
  4. Step 4: Simplify right side
    1,257,228,931.10x = 807,623,767,853,177,984
  5. Step 5: Solve for x
    x = 807,623,767,853,177,984/1,257,228,931.10
  6. Step 6: Final answer
    x = 642,384,014.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.