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Finding the Fourth Proportional to 1,330,886.90, 1,996,330.35 and 905,734.10

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Solution

The fourth proportional to 1,330,886.90, 1,996,330.35 and 905,734.10 is: 1,358,601.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,330,886.90 : 1,996,330.35 = 905,734.10 : x
  2. Step 2: Convert to fraction form
    1,330,886.90/1,996,330.35 = 905,734.10/x
  3. Step 3: Cross multiply
    1,330,886.90x = 1,996,330.35 × 905,734.10
  4. Step 4: Simplify right side
    1,330,886.90x = 1,808,144,472,859.94
  5. Step 5: Solve for x
    x = 1,808,144,472,859.94/1,330,886.90
  6. Step 6: Final answer
    x = 1,358,601.15

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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.