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Finding the Fourth Proportional to 521,312.84, 778,734.72 and 378,020.60

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Solution

The fourth proportional to 521,312.84, 778,734.72 and 378,020.60 is: 564,685.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,312.84 : 778,734.72 = 378,020.60 : x
  2. Step 2: Convert to fraction form
    521,312.84/778,734.72 = 378,020.60/x
  3. Step 3: Cross multiply
    521,312.84x = 778,734.72 × 378,020.60
  4. Step 4: Simplify right side
    521,312.84x = 294,377,766,095.23
  5. Step 5: Solve for x
    x = 294,377,766,095.23/521,312.84
  6. Step 6: Final answer
    x = 564,685.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.