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Finding the Fourth Proportional to 640,054.45, 960,078.21 and 260,973.72

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Solution

The fourth proportional to 640,054.45, 960,078.21 and 260,973.72 is: 391,459.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,054.45 : 960,078.21 = 260,973.72 : x
  2. Step 2: Convert to fraction form
    640,054.45/960,078.21 = 260,973.72/x
  3. Step 3: Cross multiply
    640,054.45x = 960,078.21 × 260,973.72
  4. Step 4: Simplify right side
    640,054.45x = 250,555,181,954.64
  5. Step 5: Solve for x
    x = 250,555,181,954.64/640,054.45
  6. Step 6: Final answer
    x = 391,459.17

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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.