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Finding the Fourth Proportional to 640,048.70, 960,069.58 and 260,967.96

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Solution

The fourth proportional to 640,048.70, 960,069.58 and 260,967.96 is: 391,450.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,048.70 : 960,069.58 = 260,967.96 : x
  2. Step 2: Convert to fraction form
    640,048.70/960,069.58 = 260,967.96/x
  3. Step 3: Cross multiply
    640,048.70x = 960,069.58 × 260,967.96
  4. Step 4: Simplify right side
    640,048.70x = 250,547,399,750.66
  5. Step 5: Solve for x
    x = 250,547,399,750.66/640,048.70
  6. Step 6: Final answer
    x = 391,450.53

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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.