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Finding the Fourth Proportional to 1,258,795,787.80, 1,888,193,681.70 and 769,019,762.20

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Solution

The fourth proportional to 1,258,795,787.80, 1,888,193,681.70 and 769,019,762.20 is: 1,153,529,643.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,258,795,787.80 : 1,888,193,681.70 = 769,019,762.20 : x
  2. Step 2: Convert to fraction form
    1,258,795,787.80/1,888,193,681.70 = 769,019,762.20/x
  3. Step 3: Cross multiply
    1,258,795,787.80x = 1,888,193,681.70 × 769,019,762.20
  4. Step 4: Simplify right side
    1,258,795,787.80x = 1,452,058,256,088,476,672
  5. Step 5: Solve for x
    x = 1,452,058,256,088,476,672/1,258,795,787.80
  6. Step 6: Final answer
    x = 1,153,529,643.30

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1.5x scale

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.