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Finding the Fourth Proportional to 993,811.80, 1,490,717.70 and 916,829.40

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Solution

The fourth proportional to 993,811.80, 1,490,717.70 and 916,829.40 is: 1,375,244.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    993,811.80 : 1,490,717.70 = 916,829.40 : x
  2. Step 2: Convert to fraction form
    993,811.80/1,490,717.70 = 916,829.40/x
  3. Step 3: Cross multiply
    993,811.80x = 1,490,717.70 × 916,829.40
  4. Step 4: Simplify right side
    993,811.80x = 1,366,733,814,460.38
  5. Step 5: Solve for x
    x = 1,366,733,814,460.38/993,811.80
  6. Step 6: Final answer
    x = 1,375,244.10

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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.