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Finding the Fourth Proportional to 554,145.90, 831,024.45 and 287,817.90

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Solution

The fourth proportional to 554,145.90, 831,024.45 and 287,817.90 is: 431,625.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,145.90 : 831,024.45 = 287,817.90 : x
  2. Step 2: Convert to fraction form
    554,145.90/831,024.45 = 287,817.90/x
  3. Step 3: Cross multiply
    554,145.90x = 831,024.45 × 287,817.90
  4. Step 4: Simplify right side
    554,145.90x = 239,183,712,047.66
  5. Step 5: Solve for x
    x = 239,183,712,047.66/554,145.90
  6. Step 6: Final answer
    x = 431,625.88

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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.