Home / 785,157.81-1,177,742.60-429,978.07

Finding the Fourth Proportional to 785,157.81, 1,177,742.60 and 429,978.07

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Solution

The fourth proportional to 785,157.81, 1,177,742.60 and 429,978.07 is: 644,970.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    785,157.81 : 1,177,742.60 = 429,978.07 : x
  2. Step 2: Convert to fraction form
    785,157.81/1,177,742.60 = 429,978.07/x
  3. Step 3: Cross multiply
    785,157.81x = 1,177,742.60 × 429,978.07
  4. Step 4: Simplify right side
    785,157.81x = 506,403,491,039.49
  5. Step 5: Solve for x
    x = 506,403,491,039.49/785,157.81
  6. Step 6: Final answer
    x = 644,970.33

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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.