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Finding the Fourth Proportional to 253,709,124.80, 355,998,990.40 and 253,709,124.80

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Solution

The fourth proportional to 253,709,124.80, 355,998,990.40 and 253,709,124.80 is: 355,998,990.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,709,124.80 : 355,998,990.40 = 253,709,124.80 : x
  2. Step 2: Convert to fraction form
    253,709,124.80/355,998,990.40 = 253,709,124.80/x
  3. Step 3: Cross multiply
    253,709,124.80x = 355,998,990.40 × 253,709,124.80
  4. Step 4: Simplify right side
    253,709,124.80x = 90,320,192,284,067,600
  5. Step 5: Solve for x
    x = 90,320,192,284,067,600/253,709,124.80
  6. Step 6: Final answer
    x = 355,998,990.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.