Home / 385,588.20-578,382.30-346,319.40

Finding the Fourth Proportional to 385,588.20, 578,382.30 and 346,319.40

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Solution

The fourth proportional to 385,588.20, 578,382.30 and 346,319.40 is: 519,479.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,588.20 : 578,382.30 = 346,319.40 : x
  2. Step 2: Convert to fraction form
    385,588.20/578,382.30 = 346,319.40/x
  3. Step 3: Cross multiply
    385,588.20x = 578,382.30 × 346,319.40
  4. Step 4: Simplify right side
    385,588.20x = 200,305,011,106.62
  5. Step 5: Solve for x
    x = 200,305,011,106.62/385,588.20
  6. Step 6: Final answer
    x = 519,479.10

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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.