Home / 390,831,228.90-586,265,696.66-128,509,972.07

Finding the Fourth Proportional to 390,831,228.90, 586,265,696.66 and 128,509,972.07

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Solution

The fourth proportional to 390,831,228.90, 586,265,696.66 and 128,509,972.07 is: 192,771,157.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,831,228.90 : 586,265,696.66 = 128,509,972.07 : x
  2. Step 2: Convert to fraction form
    390,831,228.90/586,265,696.66 = 128,509,972.07/x
  3. Step 3: Cross multiply
    390,831,228.90x = 586,265,696.66 × 128,509,972.07
  4. Step 4: Simplify right side
    390,831,228.90x = 75,340,988,300,044,704
  5. Step 5: Solve for x
    x = 75,340,988,300,044,704/390,831,228.90
  6. Step 6: Final answer
    x = 192,771,157.29

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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.