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Finding the Fourth Proportional to 878,903.80, 1,318,421.72 and 373,407.92

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Solution

The fourth proportional to 878,903.80, 1,318,421.72 and 373,407.92 is: 560,139.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,903.80 : 1,318,421.72 = 373,407.92 : x
  2. Step 2: Convert to fraction form
    878,903.80/1,318,421.72 = 373,407.92/x
  3. Step 3: Cross multiply
    878,903.80x = 1,318,421.72 × 373,407.92
  4. Step 4: Simplify right side
    878,903.80x = 492,309,112,148.02
  5. Step 5: Solve for x
    x = 492,309,112,148.02/878,903.80
  6. Step 6: Final answer
    x = 560,139.93

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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.