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Finding the Fourth Proportional to 640,045.95, 960,065.46 and 260,965.21

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Solution

The fourth proportional to 640,045.95, 960,065.46 and 260,965.21 is: 391,446.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,045.95 : 960,065.46 = 260,965.21 : x
  2. Step 2: Convert to fraction form
    640,045.95/960,065.46 = 260,965.21/x
  3. Step 3: Cross multiply
    640,045.95x = 960,065.46 × 260,965.21
  4. Step 4: Simplify right side
    640,045.95x = 250,543,683,782.61
  5. Step 5: Solve for x
    x = 250,543,683,782.61/640,045.95
  6. Step 6: Final answer
    x = 391,446.40

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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.