Home / 521,831,670.69-720,128,168.82-286,886,328.51

Finding the Fourth Proportional to 521,831,670.69, 720,128,168.82 and 286,886,328.51

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Solution

The fourth proportional to 521,831,670.69, 720,128,168.82 and 286,886,328.51 is: 395,903,388.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,831,670.69 : 720,128,168.82 = 286,886,328.51 : x
  2. Step 2: Convert to fraction form
    521,831,670.69/720,128,168.82 = 286,886,328.51/x
  3. Step 3: Cross multiply
    521,831,670.69x = 720,128,168.82 × 286,886,328.51
  4. Step 4: Simplify right side
    521,831,670.69x = 206,594,926,409,399,264
  5. Step 5: Solve for x
    x = 206,594,926,409,399,264/521,831,670.69
  6. Step 6: Final answer
    x = 395,903,388.03

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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.