Home / 458,565.12-686,878.08-289,998.72

Finding the Fourth Proportional to 458,565.12, 686,878.08 and 289,998.72

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Solution

The fourth proportional to 458,565.12, 686,878.08 and 289,998.72 is: 434,384.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,565.12 : 686,878.08 = 289,998.72 : x
  2. Step 2: Convert to fraction form
    458,565.12/686,878.08 = 289,998.72/x
  3. Step 3: Cross multiply
    458,565.12x = 686,878.08 × 289,998.72
  4. Step 4: Simplify right side
    458,565.12x = 199,193,763,996.06
  5. Step 5: Solve for x
    x = 199,193,763,996.06/458,565.12
  6. Step 6: Final answer
    x = 434,384.90

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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.