Home / 393,328,908.95-542,794,002.87-217,117,018.85

Finding the Fourth Proportional to 393,328,908.95, 542,794,002.87 and 217,117,018.85

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Solution

The fourth proportional to 393,328,908.95, 542,794,002.87 and 217,117,018.85 is: 299,621,545.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,328,908.95 : 542,794,002.87 = 217,117,018.85 : x
  2. Step 2: Convert to fraction form
    393,328,908.95/542,794,002.87 = 217,117,018.85/x
  3. Step 3: Cross multiply
    393,328,908.95x = 542,794,002.87 × 217,117,018.85
  4. Step 4: Simplify right side
    393,328,908.95x = 117,849,815,750,078,768
  5. Step 5: Solve for x
    x = 117,849,815,750,078,768/393,328,908.95
  6. Step 6: Final answer
    x = 299,621,545.91

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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.