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Finding the Fourth Proportional to 288,521.78, 398,271.18 and 258,253.70

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Solution

The fourth proportional to 288,521.78, 398,271.18 and 258,253.70 is: 356,489.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,521.78 : 398,271.18 = 258,253.70 : x
  2. Step 2: Convert to fraction form
    288,521.78/398,271.18 = 258,253.70/x
  3. Step 3: Cross multiply
    288,521.78x = 398,271.18 × 258,253.70
  4. Step 4: Simplify right side
    288,521.78x = 102,855,005,838.37
  5. Step 5: Solve for x
    x = 102,855,005,838.37/288,521.78
  6. Step 6: Final answer
    x = 356,489.57

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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.