Home / 390,831,319.62-586,265,832.72-128,510,062.56

Finding the Fourth Proportional to 390,831,319.62, 586,265,832.72 and 128,510,062.56

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Solution

The fourth proportional to 390,831,319.62, 586,265,832.72 and 128,510,062.56 is: 192,771,293.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,831,319.62 : 586,265,832.72 = 128,510,062.56 : x
  2. Step 2: Convert to fraction form
    390,831,319.62/586,265,832.72 = 128,510,062.56/x
  3. Step 3: Cross multiply
    390,831,319.62x = 586,265,832.72 × 128,510,062.56
  4. Step 4: Simplify right side
    390,831,319.62x = 75,341,058,839,637,696
  5. Step 5: Solve for x
    x = 75,341,058,839,637,696/390,831,319.62
  6. Step 6: Final answer
    x = 192,771,293.03

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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.