Home / 485,411,483.71-728,037,509.38-208,988,278.61

Finding the Fourth Proportional to 485,411,483.71, 728,037,509.38 and 208,988,278.61

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Solution

The fourth proportional to 485,411,483.71, 728,037,509.38 and 208,988,278.61 is: 313,448,097.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,411,483.71 : 728,037,509.38 = 208,988,278.61 : x
  2. Step 2: Convert to fraction form
    485,411,483.71/728,037,509.38 = 208,988,278.61/x
  3. Step 3: Cross multiply
    485,411,483.71x = 728,037,509.38 × 208,988,278.61
  4. Step 4: Simplify right side
    485,411,483.71x = 152,151,305,850,135,584
  5. Step 5: Solve for x
    x = 152,151,305,850,135,584/485,411,483.71
  6. Step 6: Final answer
    x = 313,448,097.04

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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.