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Finding the Fourth Proportional to 640,051.95, 960,074.46 and 260,971.22

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Solution

The fourth proportional to 640,051.95, 960,074.46 and 260,971.22 is: 391,455.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,051.95 : 960,074.46 = 260,971.22 : x
  2. Step 2: Convert to fraction form
    640,051.95/960,074.46 = 260,971.22/x
  3. Step 3: Cross multiply
    640,051.95x = 960,074.46 × 260,971.22
  4. Step 4: Simplify right side
    640,051.95x = 250,551,803,117.04
  5. Step 5: Solve for x
    x = 250,551,803,117.04/640,051.95
  6. Step 6: Final answer
    x = 391,455.42

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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.