Home / 405,978,017.76-560,255,039.28-220,341,258.72

Finding the Fourth Proportional to 405,978,017.76, 560,255,039.28 and 220,341,258.72

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Solution

The fourth proportional to 405,978,017.76, 560,255,039.28 and 220,341,258.72 is: 304,073,854.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,978,017.76 : 560,255,039.28 = 220,341,258.72 : x
  2. Step 2: Convert to fraction form
    405,978,017.76/560,255,039.28 = 220,341,258.72/x
  3. Step 3: Cross multiply
    405,978,017.76x = 560,255,039.28 × 220,341,258.72
  4. Step 4: Simplify right side
    405,978,017.76x = 123,447,300,559,178,240
  5. Step 5: Solve for x
    x = 123,447,300,559,178,240/405,978,017.76
  6. Step 6: Final answer
    x = 304,073,854.15

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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.