Home / 500,095,990.72-690,132,467.20-280,079,416.72

Finding the Fourth Proportional to 500,095,990.72, 690,132,467.20 and 280,079,416.72

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Solution

The fourth proportional to 500,095,990.72, 690,132,467.20 and 280,079,416.72 is: 386,509,595.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,095,990.72 : 690,132,467.20 = 280,079,416.72 : x
  2. Step 2: Convert to fraction form
    500,095,990.72/690,132,467.20 = 280,079,416.72/x
  3. Step 3: Cross multiply
    500,095,990.72x = 690,132,467.20 × 280,079,416.72
  4. Step 4: Simplify right side
    500,095,990.72x = 193,291,898,872,910,560
  5. Step 5: Solve for x
    x = 193,291,898,872,910,560/500,095,990.72
  6. Step 6: Final answer
    x = 386,509,595.08

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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.