Home / 1,218,076,002.45-1,680,901,391.16-689,428,638.32

Finding the Fourth Proportional to 1,218,076,002.45, 1,680,901,391.16 and 689,428,638.32

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Solution

The fourth proportional to 1,218,076,002.45, 1,680,901,391.16 and 689,428,638.32 is: 951,386,904.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218,076,002.45 : 1,680,901,391.16 = 689,428,638.32 : x
  2. Step 2: Convert to fraction form
    1,218,076,002.45/1,680,901,391.16 = 689,428,638.32/x
  3. Step 3: Cross multiply
    1,218,076,002.45x = 1,680,901,391.16 × 689,428,638.32
  4. Step 4: Simplify right side
    1,218,076,002.45x = 1,158,861,557,249,228,032
  5. Step 5: Solve for x
    x = 1,158,861,557,249,228,032/1,218,076,002.45
  6. Step 6: Final answer
    x = 951,386,904.36

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1.5x scale

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.