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Finding the Fourth Proportional to 878,929,085.07, 1,212,370,423.08 and 521,443,768.03

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Solution

The fourth proportional to 878,929,085.07, 1,212,370,423.08 and 521,443,768.03 is: 719,265,083.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,929,085.07 : 1,212,370,423.08 = 521,443,768.03 : x
  2. Step 2: Convert to fraction form
    878,929,085.07/1,212,370,423.08 = 521,443,768.03/x
  3. Step 3: Cross multiply
    878,929,085.07x = 1,212,370,423.08 × 521,443,768.03
  4. Step 4: Simplify right side
    878,929,085.07x = 632,183,001,658,960,384
  5. Step 5: Solve for x
    x = 632,183,001,658,960,384/878,929,085.07
  6. Step 6: Final answer
    x = 719,265,083.38

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1.5x scale

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.