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Finding the Fourth Proportional to 1,249,811.19, 1,724,771.03 and 766,642.77

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Solution

The fourth proportional to 1,249,811.19, 1,724,771.03 and 766,642.77 is: 1,057,986.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,249,811.19 : 1,724,771.03 = 766,642.77 : x
  2. Step 2: Convert to fraction form
    1,249,811.19/1,724,771.03 = 766,642.77/x
  3. Step 3: Cross multiply
    1,249,811.19x = 1,724,771.03 × 766,642.77
  4. Step 4: Simplify right side
    1,249,811.19x = 1,322,283,236,221.74
  5. Step 5: Solve for x
    x = 1,322,283,236,221.74/1,249,811.19
  6. Step 6: Final answer
    x = 1,057,986.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.