Home / 1,315,816.40-1,971,100.20-916,907.60

Finding the Fourth Proportional to 1,315,816.40, 1,971,100.20 and 916,907.60

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Solution

The fourth proportional to 1,315,816.40, 1,971,100.20 and 916,907.60 is: 1,373,532.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315,816.40 : 1,971,100.20 = 916,907.60 : x
  2. Step 2: Convert to fraction form
    1,315,816.40/1,971,100.20 = 916,907.60/x
  3. Step 3: Cross multiply
    1,315,816.40x = 1,971,100.20 × 916,907.60
  4. Step 4: Simplify right side
    1,315,816.40x = 1,807,316,753,741.52
  5. Step 5: Solve for x
    x = 1,807,316,753,741.52/1,315,816.40
  6. Step 6: Final answer
    x = 1,373,532.62

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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.