Home / 990,293,813.60-1,485,440,720.40-531,128,789.60

Finding the Fourth Proportional to 990,293,813.60, 1,485,440,720.40 and 531,128,789.60

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Solution

The fourth proportional to 990,293,813.60, 1,485,440,720.40 and 531,128,789.60 is: 796,693,184.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,293,813.60 : 1,485,440,720.40 = 531,128,789.60 : x
  2. Step 2: Convert to fraction form
    990,293,813.60/1,485,440,720.40 = 531,128,789.60/x
  3. Step 3: Cross multiply
    990,293,813.60x = 1,485,440,720.40 × 531,128,789.60
  4. Step 4: Simplify right side
    990,293,813.60x = 788,960,331,848,604,160
  5. Step 5: Solve for x
    x = 788,960,331,848,604,160/990,293,813.60
  6. Step 6: Final answer
    x = 796,693,184.40

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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.