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Finding the Fourth Proportional to 385,346.97, 578,075.83 and 119,128.25

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Solution

The fourth proportional to 385,346.97, 578,075.83 and 119,128.25 is: 178,709.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,346.97 : 578,075.83 = 119,128.25 : x
  2. Step 2: Convert to fraction form
    385,346.97/578,075.83 = 119,128.25/x
  3. Step 3: Cross multiply
    385,346.97x = 578,075.83 × 119,128.25
  4. Step 4: Simplify right side
    385,346.97x = 68,865,163,142.57
  5. Step 5: Solve for x
    x = 68,865,163,142.57/385,346.97
  6. Step 6: Final answer
    x = 178,709.50

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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.