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Finding the Fourth Proportional to 518,000.30, 777,000.45 and 378,032.30

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Solution

The fourth proportional to 518,000.30, 777,000.45 and 378,032.30 is: 567,048.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,000.30 : 777,000.45 = 378,032.30 : x
  2. Step 2: Convert to fraction form
    518,000.30/777,000.45 = 378,032.30/x
  3. Step 3: Cross multiply
    518,000.30x = 777,000.45 × 378,032.30
  4. Step 4: Simplify right side
    518,000.30x = 293,731,267,214.54
  5. Step 5: Solve for x
    x = 293,731,267,214.54/518,000.30
  6. Step 6: Final answer
    x = 567,048.45

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Double scale
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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.