Home / 726,749,980.80-1,090,124,971.20-420,639,964.80

Finding the Fourth Proportional to 726,749,980.80, 1,090,124,971.20 and 420,639,964.80

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Solution

The fourth proportional to 726,749,980.80, 1,090,124,971.20 and 420,639,964.80 is: 630,959,947.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    726,749,980.80 : 1,090,124,971.20 = 420,639,964.80 : x
  2. Step 2: Convert to fraction form
    726,749,980.80/1,090,124,971.20 = 420,639,964.80/x
  3. Step 3: Cross multiply
    726,749,980.80x = 1,090,124,971.20 × 420,639,964.80
  4. Step 4: Simplify right side
    726,749,980.80x = 458,550,129,513,169,024
  5. Step 5: Solve for x
    x = 458,550,129,513,169,024/726,749,980.80
  6. Step 6: Final answer
    x = 630,959,947.20

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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.