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Finding the Fourth Proportional to 570,445.31, 856,509.05 and 318,218.60

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Solution

The fourth proportional to 570,445.31, 856,509.05 and 318,218.60 is: 477,797.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,445.31 : 856,509.05 = 318,218.60 : x
  2. Step 2: Convert to fraction form
    570,445.31/856,509.05 = 318,218.60/x
  3. Step 3: Cross multiply
    570,445.31x = 856,509.05 × 318,218.60
  4. Step 4: Simplify right side
    570,445.31x = 272,557,113,715.15
  5. Step 5: Solve for x
    x = 272,557,113,715.15/570,445.31
  6. Step 6: Final answer
    x = 477,797.10

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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.