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Finding the Fourth Proportional to 500,548.64, 690,203.60 and 318,972.94

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Solution

The fourth proportional to 500,548.64, 690,203.60 and 318,972.94 is: 439,829.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,548.64 : 690,203.60 = 318,972.94 : x
  2. Step 2: Convert to fraction form
    500,548.64/690,203.60 = 318,972.94/x
  3. Step 3: Cross multiply
    500,548.64x = 690,203.60 × 318,972.94
  4. Step 4: Simplify right side
    500,548.64x = 220,156,271,490.58
  5. Step 5: Solve for x
    x = 220,156,271,490.58/500,548.64
  6. Step 6: Final answer
    x = 439,829.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.