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Finding the Fourth Proportional to 640,055.45, 960,079.71 and 260,974.72

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Solution

The fourth proportional to 640,055.45, 960,079.71 and 260,974.72 is: 391,460.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,055.45 : 960,079.71 = 260,974.72 : x
  2. Step 2: Convert to fraction form
    640,055.45/960,079.71 = 260,974.72/x
  3. Step 3: Cross multiply
    640,055.45x = 960,079.71 × 260,974.72
  4. Step 4: Simplify right side
    640,055.45x = 250,556,533,494.93
  5. Step 5: Solve for x
    x = 250,556,533,494.93/640,055.45
  6. Step 6: Final answer
    x = 391,460.67

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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.