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Finding the Fourth Proportional to 1,259,713,095.80, 1,889,569,643.70 and 639,840,313.40

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Solution

The fourth proportional to 1,259,713,095.80, 1,889,569,643.70 and 639,840,313.40 is: 959,760,470.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,259,713,095.80 : 1,889,569,643.70 = 639,840,313.40 : x
  2. Step 2: Convert to fraction form
    1,259,713,095.80/1,889,569,643.70 = 639,840,313.40/x
  3. Step 3: Cross multiply
    1,259,713,095.80x = 1,889,569,643.70 × 639,840,313.40
  4. Step 4: Simplify right side
    1,259,713,095.80x = 1,209,022,833,016,134,400
  5. Step 5: Solve for x
    x = 1,209,022,833,016,134,400/1,259,713,095.80
  6. Step 6: Final answer
    x = 959,760,470.10

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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.