Home / 385,442,272.76-531,911,016.30-209,230,390.16

Finding the Fourth Proportional to 385,442,272.76, 531,911,016.30 and 209,230,390.16

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Solution

The fourth proportional to 385,442,272.76, 531,911,016.30 and 209,230,390.16 is: 288,738,307.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,442,272.76 : 531,911,016.30 = 209,230,390.16 : x
  2. Step 2: Convert to fraction form
    385,442,272.76/531,911,016.30 = 209,230,390.16/x
  3. Step 3: Cross multiply
    385,442,272.76x = 531,911,016.30 × 209,230,390.16
  4. Step 4: Simplify right side
    385,442,272.76x = 111,291,949,470,851,120
  5. Step 5: Solve for x
    x = 111,291,949,470,851,120/385,442,272.76
  6. Step 6: Final answer
    x = 288,738,307.49

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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.