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Finding the Fourth Proportional to 603,443.60, 904,128.60 and 318,712.40

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Solution

The fourth proportional to 603,443.60, 904,128.60 and 318,712.40 is: 477,521.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,443.60 : 904,128.60 = 318,712.40 : x
  2. Step 2: Convert to fraction form
    603,443.60/904,128.60 = 318,712.40/x
  3. Step 3: Cross multiply
    603,443.60x = 904,128.60 × 318,712.40
  4. Step 4: Simplify right side
    603,443.60x = 288,156,996,014.64
  5. Step 5: Solve for x
    x = 288,156,996,014.64/603,443.60
  6. Step 6: Final answer
    x = 477,521.01

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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.