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Finding the Fourth Proportional to 1,235,742.40, 1,853,786.40 and 525,764.80

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Solution

The fourth proportional to 1,235,742.40, 1,853,786.40 and 525,764.80 is: 788,720.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,235,742.40 : 1,853,786.40 = 525,764.80 : x
  2. Step 2: Convert to fraction form
    1,235,742.40/1,853,786.40 = 525,764.80/x
  3. Step 3: Cross multiply
    1,235,742.40x = 1,853,786.40 × 525,764.80
  4. Step 4: Simplify right side
    1,235,742.40x = 974,655,635,838.72
  5. Step 5: Solve for x
    x = 974,655,635,838.72/1,235,742.40
  6. Step 6: Final answer
    x = 788,720.72

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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.