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Finding the Fourth Proportional to 966,438.60, 1,449,657.90 and 817,139.40

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Solution

The fourth proportional to 966,438.60, 1,449,657.90 and 817,139.40 is: 1,225,709.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    966,438.60 : 1,449,657.90 = 817,139.40 : x
  2. Step 2: Convert to fraction form
    966,438.60/1,449,657.90 = 817,139.40/x
  3. Step 3: Cross multiply
    966,438.60x = 1,449,657.90 × 817,139.40
  4. Step 4: Simplify right side
    966,438.60x = 1,184,572,586,611.26
  5. Step 5: Solve for x
    x = 1,184,572,586,611.26/966,438.60
  6. Step 6: Final answer
    x = 1,225,709.10

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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.