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Finding the Fourth Proportional to 680,554.40, 939,155.84 and 378,748.40

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Solution

The fourth proportional to 680,554.40, 939,155.84 and 378,748.40 is: 522,667.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,554.40 : 939,155.84 = 378,748.40 : x
  2. Step 2: Convert to fraction form
    680,554.40/939,155.84 = 378,748.40/x
  3. Step 3: Cross multiply
    680,554.40x = 939,155.84 × 378,748.40
  4. Step 4: Simplify right side
    680,554.40x = 355,703,771,750.66
  5. Step 5: Solve for x
    x = 355,703,771,750.66/680,554.40
  6. Step 6: Final answer
    x = 522,667.65

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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.