Home / 388,102,122.51-535,578,156.18-211,890,112.40

Finding the Fourth Proportional to 388,102,122.51, 535,578,156.18 and 211,890,112.40

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Solution

The fourth proportional to 388,102,122.51, 535,578,156.18 and 211,890,112.40 is: 292,406,841.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,102,122.51 : 535,578,156.18 = 211,890,112.40 : x
  2. Step 2: Convert to fraction form
    388,102,122.51/535,578,156.18 = 211,890,112.40/x
  3. Step 3: Cross multiply
    388,102,122.51x = 535,578,156.18 × 211,890,112.40
  4. Step 4: Simplify right side
    388,102,122.51x = 113,483,715,709,287,072
  5. Step 5: Solve for x
    x = 113,483,715,709,287,072/388,102,122.51
  6. Step 6: Final answer
    x = 292,406,841.21

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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.