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Finding the Fourth Proportional to 713,143.32, 984,145.48 and 390,846.48

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Solution

The fourth proportional to 713,143.32, 984,145.48 and 390,846.48 is: 539,372.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,143.32 : 984,145.48 = 390,846.48 : x
  2. Step 2: Convert to fraction form
    713,143.32/984,145.48 = 390,846.48/x
  3. Step 3: Cross multiply
    713,143.32x = 984,145.48 × 390,846.48
  4. Step 4: Simplify right side
    713,143.32x = 384,649,796,665.91
  5. Step 5: Solve for x
    x = 384,649,796,665.91/713,143.32
  6. Step 6: Final answer
    x = 539,372.36

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1.5x scale

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.