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Finding the Fourth Proportional to 939,385, 1,409,336.70 and 274,537

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Solution

The fourth proportional to 939,385, 1,409,336.70 and 274,537 is: 411,881.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    939,385 : 1,409,336.70 = 274,537 : x
  2. Step 2: Convert to fraction form
    939,385/1,409,336.70 = 274,537/x
  3. Step 3: Cross multiply
    939,385x = 1,409,336.70 × 274,537
  4. Step 4: Simplify right side
    939,385x = 386,915,069,607.90
  5. Step 5: Solve for x
    x = 386,915,069,607.90/939,385
  6. Step 6: Final answer
    x = 411,881.25

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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.