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Finding the Fourth Proportional to 680,931.32, 939,369.42 and 439,291.44

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Solution

The fourth proportional to 680,931.32, 939,369.42 and 439,291.44 is: 606,018.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,931.32 : 939,369.42 = 439,291.44 : x
  2. Step 2: Convert to fraction form
    680,931.32/939,369.42 = 439,291.44/x
  3. Step 3: Cross multiply
    680,931.32x = 939,369.42 × 439,291.44
  4. Step 4: Simplify right side
    680,931.32x = 412,656,945,203.77
  5. Step 5: Solve for x
    x = 412,656,945,203.77/680,931.32
  6. Step 6: Final answer
    x = 606,018.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.