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Finding the Fourth Proportional to 385,475.10, 578,212.65 and 245,334.30

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Solution

The fourth proportional to 385,475.10, 578,212.65 and 245,334.30 is: 368,001.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,475.10 : 578,212.65 = 245,334.30 : x
  2. Step 2: Convert to fraction form
    385,475.10/578,212.65 = 245,334.30/x
  3. Step 3: Cross multiply
    385,475.10x = 578,212.65 × 245,334.30
  4. Step 4: Simplify right side
    385,475.10x = 141,855,395,738.90
  5. Step 5: Solve for x
    x = 141,855,395,738.90/385,475.10
  6. Step 6: Final answer
    x = 368,001.45

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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.