Home / 390,355,579.16-538,687,510.86-211,739,020.38

Finding the Fourth Proportional to 390,355,579.16, 538,687,510.86 and 211,739,020.38

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Solution

The fourth proportional to 390,355,579.16, 538,687,510.86 and 211,739,020.38 is: 292,198,118.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,355,579.16 : 538,687,510.86 = 211,739,020.38 : x
  2. Step 2: Convert to fraction form
    390,355,579.16/538,687,510.86 = 211,739,020.38/x
  3. Step 3: Cross multiply
    390,355,579.16x = 538,687,510.86 × 211,739,020.38
  4. Step 4: Simplify right side
    390,355,579.16x = 114,061,165,840,437,008
  5. Step 5: Solve for x
    x = 114,061,165,840,437,008/390,355,579.16
  6. Step 6: Final answer
    x = 292,198,118.66

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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.