Home / 390,521,630.85-582,332,143.47-387,016,482.21

Finding the Fourth Proportional to 390,521,630.85, 582,332,143.47 and 387,016,482.21

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Solution

The fourth proportional to 390,521,630.85, 582,332,143.47 and 387,016,482.21 is: 577,105,388.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,521,630.85 : 582,332,143.47 = 387,016,482.21 : x
  2. Step 2: Convert to fraction form
    390,521,630.85/582,332,143.47 = 387,016,482.21/x
  3. Step 3: Cross multiply
    390,521,630.85x = 582,332,143.47 × 387,016,482.21
  4. Step 4: Simplify right side
    390,521,630.85x = 225,372,137,643,568,416
  5. Step 5: Solve for x
    x = 225,372,137,643,568,416/390,521,630.85
  6. Step 6: Final answer
    x = 577,105,388.89

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.