Home / 385,815.40-578,723.10-245,847.40

Finding the Fourth Proportional to 385,815.40, 578,723.10 and 245,847.40

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Solution

The fourth proportional to 385,815.40, 578,723.10 and 245,847.40 is: 368,771.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,815.40 : 578,723.10 = 245,847.40 : x
  2. Step 2: Convert to fraction form
    385,815.40/578,723.10 = 245,847.40/x
  3. Step 3: Cross multiply
    385,815.40x = 578,723.10 × 245,847.40
  4. Step 4: Simplify right side
    385,815.40x = 142,277,569,454.94
  5. Step 5: Solve for x
    x = 142,277,569,454.94/385,815.40
  6. Step 6: Final answer
    x = 368,771.10

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Similar ratio
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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.