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Finding the Fourth Proportional to 911,438.10, 1,365,340.32 and 551,417.40

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Solution

The fourth proportional to 911,438.10, 1,365,340.32 and 551,417.40 is: 826,026.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,438.10 : 1,365,340.32 = 551,417.40 : x
  2. Step 2: Convert to fraction form
    911,438.10/1,365,340.32 = 551,417.40/x
  3. Step 3: Cross multiply
    911,438.10x = 1,365,340.32 × 551,417.40
  4. Step 4: Simplify right side
    911,438.10x = 752,872,409,369.57
  5. Step 5: Solve for x
    x = 752,872,409,369.57/911,438.10
  6. Step 6: Final answer
    x = 826,026.92

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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.