Home / 690,411,931.36-1,035,610,811.16-399,093,689.86

Finding the Fourth Proportional to 690,411,931.36, 1,035,610,811.16 and 399,093,689.86

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Solution

The fourth proportional to 690,411,931.36, 1,035,610,811.16 and 399,093,689.86 is: 598,636,438.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,411,931.36 : 1,035,610,811.16 = 399,093,689.86 : x
  2. Step 2: Convert to fraction form
    690,411,931.36/1,035,610,811.16 = 399,093,689.86/x
  3. Step 3: Cross multiply
    690,411,931.36x = 1,035,610,811.16 × 399,093,689.86
  4. Step 4: Simplify right side
    690,411,931.36x = 413,305,739,888,338,880
  5. Step 5: Solve for x
    x = 413,305,739,888,338,880/690,411,931.36
  6. Step 6: Final answer
    x = 598,636,438.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.