Home / 720,200,445.78-993,877,623.72-390,175,584.78

Finding the Fourth Proportional to 720,200,445.78, 993,877,623.72 and 390,175,584.78

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Solution

The fourth proportional to 720,200,445.78, 993,877,623.72 and 390,175,584.78 is: 538,442,853.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,200,445.78 : 993,877,623.72 = 390,175,584.78 : x
  2. Step 2: Convert to fraction form
    720,200,445.78/993,877,623.72 = 390,175,584.78/x
  3. Step 3: Cross multiply
    720,200,445.78x = 993,877,623.72 × 390,175,584.78
  4. Step 4: Simplify right side
    720,200,445.78x = 387,786,783,034,707,776
  5. Step 5: Solve for x
    x = 387,786,783,034,707,776/720,200,445.78
  6. Step 6: Final answer
    x = 538,442,853.38

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1.5x scale

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.