Home / 390,195,792.04-538,420,702.56-213,937,405.84

Finding the Fourth Proportional to 390,195,792.04, 538,420,702.56 and 213,937,405.84

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Solution

The fourth proportional to 390,195,792.04, 538,420,702.56 and 213,937,405.84 is: 295,206,485.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,195,792.04 : 538,420,702.56 = 213,937,405.84 : x
  2. Step 2: Convert to fraction form
    390,195,792.04/538,420,702.56 = 213,937,405.84/x
  3. Step 3: Cross multiply
    390,195,792.04x = 538,420,702.56 × 213,937,405.84
  4. Step 4: Simplify right side
    390,195,792.04x = 115,188,328,356,236,640
  5. Step 5: Solve for x
    x = 115,188,328,356,236,640/390,195,792.04
  6. Step 6: Final answer
    x = 295,206,485.32

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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.