Home / 1,287,902.40-1,931,853.60-401,438.40

Finding the Fourth Proportional to 1,287,902.40, 1,931,853.60 and 401,438.40

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Solution

The fourth proportional to 1,287,902.40, 1,931,853.60 and 401,438.40 is: 602,157.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,902.40 : 1,931,853.60 = 401,438.40 : x
  2. Step 2: Convert to fraction form
    1,287,902.40/1,931,853.60 = 401,438.40/x
  3. Step 3: Cross multiply
    1,287,902.40x = 1,931,853.60 × 401,438.40
  4. Step 4: Simplify right side
    1,287,902.40x = 775,520,218,218.24
  5. Step 5: Solve for x
    x = 775,520,218,218.24/1,287,902.40
  6. Step 6: Final answer
    x = 602,157.60

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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.