Home / 645,040,969.74-890,130,898.89-380,808,080.10

Finding the Fourth Proportional to 645,040,969.74, 890,130,898.89 and 380,808,080.10

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Solution

The fourth proportional to 645,040,969.74, 890,130,898.89 and 380,808,080.10 is: 525,500,014.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,040,969.74 : 890,130,898.89 = 380,808,080.10 : x
  2. Step 2: Convert to fraction form
    645,040,969.74/890,130,898.89 = 380,808,080.10/x
  3. Step 3: Cross multiply
    645,040,969.74x = 890,130,898.89 × 380,808,080.10
  4. Step 4: Simplify right side
    645,040,969.74x = 338,969,038,643,988,160
  5. Step 5: Solve for x
    x = 338,969,038,643,988,160/645,040,969.74
  6. Step 6: Final answer
    x = 525,500,014.02

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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.