Home / 390,243,143.04-538,381,920.96-225,198,821.76

Finding the Fourth Proportional to 390,243,143.04, 538,381,920.96 and 225,198,821.76

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Solution

The fourth proportional to 390,243,143.04, 538,381,920.96 and 225,198,821.76 is: 310,685,726.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,243,143.04 : 538,381,920.96 = 225,198,821.76 : x
  2. Step 2: Convert to fraction form
    390,243,143.04/538,381,920.96 = 225,198,821.76/x
  3. Step 3: Cross multiply
    390,243,143.04x = 538,381,920.96 × 225,198,821.76
  4. Step 4: Simplify right side
    390,243,143.04x = 121,242,974,257,077,456
  5. Step 5: Solve for x
    x = 121,242,974,257,077,456/390,243,143.04
  6. Step 6: Final answer
    x = 310,685,726.12

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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.