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Finding the Fourth Proportional to 570,386.81, 856,421.30 and 318,160.10

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Solution

The fourth proportional to 570,386.81, 856,421.30 and 318,160.10 is: 477,709.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,386.81 : 856,421.30 = 318,160.10 : x
  2. Step 2: Convert to fraction form
    570,386.81/856,421.30 = 318,160.10/x
  3. Step 3: Cross multiply
    570,386.81x = 856,421.30 × 318,160.10
  4. Step 4: Simplify right side
    570,386.81x = 272,479,089,386.58
  5. Step 5: Solve for x
    x = 272,479,089,386.58/570,386.81
  6. Step 6: Final answer
    x = 477,709.31

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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.