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Finding the Fourth Proportional to 672,270.60, 1,008,405.90 and 520,055.40

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Solution

The fourth proportional to 672,270.60, 1,008,405.90 and 520,055.40 is: 780,083.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,270.60 : 1,008,405.90 = 520,055.40 : x
  2. Step 2: Convert to fraction form
    672,270.60/1,008,405.90 = 520,055.40/x
  3. Step 3: Cross multiply
    672,270.60x = 1,008,405.90 × 520,055.40
  4. Step 4: Simplify right side
    672,270.60x = 524,426,933,686.86
  5. Step 5: Solve for x
    x = 524,426,933,686.86/672,270.60
  6. Step 6: Final answer
    x = 780,083.10

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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.