Home / 385,312.40-577,738.20-198,688.40

Finding the Fourth Proportional to 385,312.40, 577,738.20 and 198,688.40

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Solution

The fourth proportional to 385,312.40, 577,738.20 and 198,688.40 is: 297,913.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,312.40 : 577,738.20 = 198,688.40 : x
  2. Step 2: Convert to fraction form
    385,312.40/577,738.20 = 198,688.40/x
  3. Step 3: Cross multiply
    385,312.40x = 577,738.20 × 198,688.40
  4. Step 4: Simplify right side
    385,312.40x = 114,789,878,576.88
  5. Step 5: Solve for x
    x = 114,789,878,576.88/385,312.40
  6. Step 6: Final answer
    x = 297,913.79

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1.5x scale

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.