Home / 390,368,520.72-538,674,248.97-223,071,582.69

Finding the Fourth Proportional to 390,368,520.72, 538,674,248.97 and 223,071,582.69

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Solution

The fourth proportional to 390,368,520.72, 538,674,248.97 and 223,071,582.69 is: 307,819,178.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,368,520.72 : 538,674,248.97 = 223,071,582.69 : x
  2. Step 2: Convert to fraction form
    390,368,520.72/538,674,248.97 = 223,071,582.69/x
  3. Step 3: Cross multiply
    390,368,520.72x = 538,674,248.97 × 223,071,582.69
  4. Step 4: Simplify right side
    390,368,520.72x = 120,162,917,272,085,008
  5. Step 5: Solve for x
    x = 120,162,917,272,085,008/390,368,520.72
  6. Step 6: Final answer
    x = 307,819,178.27

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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.