Home / 643,749.12-888,347.52-357,281.28

Finding the Fourth Proportional to 643,749.12, 888,347.52 and 357,281.28

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Solution

The fourth proportional to 643,749.12, 888,347.52 and 357,281.28 is: 493,033.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,749.12 : 888,347.52 = 357,281.28 : x
  2. Step 2: Convert to fraction form
    643,749.12/888,347.52 = 357,281.28/x
  3. Step 3: Cross multiply
    643,749.12x = 888,347.52 × 357,281.28
  4. Step 4: Simplify right side
    643,749.12x = 317,389,939,030.43
  5. Step 5: Solve for x
    x = 317,389,939,030.43/643,749.12
  6. Step 6: Final answer
    x = 493,033.59

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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.