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Finding the Fourth Proportional to 618,765.48, 928,412.90 and 259,020.40

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Solution

The fourth proportional to 618,765.48, 928,412.90 and 259,020.40 is: 388,641.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,765.48 : 928,412.90 = 259,020.40 : x
  2. Step 2: Convert to fraction form
    618,765.48/928,412.90 = 259,020.40/x
  3. Step 3: Cross multiply
    618,765.48x = 928,412.90 × 259,020.40
  4. Step 4: Simplify right side
    618,765.48x = 240,477,878,709.25
  5. Step 5: Solve for x
    x = 240,477,878,709.25/618,765.48
  6. Step 6: Final answer
    x = 388,641.40

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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.