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Finding the Fourth Proportional to 612,038,411.37, 844,294,800.99 and 388,637,871.21

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Solution

The fourth proportional to 612,038,411.37, 844,294,800.99 and 388,637,871.21 is: 536,118,204.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,038,411.37 : 844,294,800.99 = 388,637,871.21 : x
  2. Step 2: Convert to fraction form
    612,038,411.37/844,294,800.99 = 388,637,871.21/x
  3. Step 3: Cross multiply
    612,038,411.37x = 844,294,800.99 × 388,637,871.21
  4. Step 4: Simplify right side
    612,038,411.37x = 328,124,934,130,424,192
  5. Step 5: Solve for x
    x = 328,124,934,130,424,192/612,038,411.37
  6. Step 6: Final answer
    x = 536,118,204.40

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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.