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Finding the Fourth Proportional to 579,812.80, 869,762.40 and 205,787.20

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Solution

The fourth proportional to 579,812.80, 869,762.40 and 205,787.20 is: 308,696.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,812.80 : 869,762.40 = 205,787.20 : x
  2. Step 2: Convert to fraction form
    579,812.80/869,762.40 = 205,787.20/x
  3. Step 3: Cross multiply
    579,812.80x = 869,762.40 × 205,787.20
  4. Step 4: Simplify right side
    579,812.80x = 178,985,968,961.28
  5. Step 5: Solve for x
    x = 178,985,968,961.28/579,812.80
  6. Step 6: Final answer
    x = 308,696.13

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1.5x scale

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.