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Finding the Fourth Proportional to 640,519.70, 960,123.45 and 374,143.10

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Solution

The fourth proportional to 640,519.70, 960,123.45 and 374,143.10 is: 560,831.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,519.70 : 960,123.45 = 374,143.10 : x
  2. Step 2: Convert to fraction form
    640,519.70/960,123.45 = 374,143.10/x
  3. Step 3: Cross multiply
    640,519.70x = 960,123.45 × 374,143.10
  4. Step 4: Simplify right side
    640,519.70x = 359,223,563,965.70
  5. Step 5: Solve for x
    x = 359,223,563,965.70/640,519.70
  6. Step 6: Final answer
    x = 560,831.41

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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.