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Finding the Fourth Proportional to 554,963.40, 830,601.90 and 389,075.40

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Solution

The fourth proportional to 554,963.40, 830,601.90 and 389,075.40 is: 582,320.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,963.40 : 830,601.90 = 389,075.40 : x
  2. Step 2: Convert to fraction form
    554,963.40/830,601.90 = 389,075.40/x
  3. Step 3: Cross multiply
    554,963.40x = 830,601.90 × 389,075.40
  4. Step 4: Simplify right side
    554,963.40x = 323,166,766,483.26
  5. Step 5: Solve for x
    x = 323,166,766,483.26/554,963.40
  6. Step 6: Final answer
    x = 582,320.86

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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.