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Finding the Fourth Proportional to 916,998.90, 1,375,559.10 and 243,070.80

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Solution

The fourth proportional to 916,998.90, 1,375,559.10 and 243,070.80 is: 364,622.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    916,998.90 : 1,375,559.10 = 243,070.80 : x
  2. Step 2: Convert to fraction form
    916,998.90/1,375,559.10 = 243,070.80/x
  3. Step 3: Cross multiply
    916,998.90x = 1,375,559.10 × 243,070.80
  4. Step 4: Simplify right side
    916,998.90x = 334,358,250,884.28
  5. Step 5: Solve for x
    x = 334,358,250,884.28/916,998.90
  6. Step 6: Final answer
    x = 364,622.30

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1.5x scale

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.