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Finding the Fourth Proportional to 655,611.70, 983,417.55 and 578,629.30

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Solution

The fourth proportional to 655,611.70, 983,417.55 and 578,629.30 is: 867,943.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,611.70 : 983,417.55 = 578,629.30 : x
  2. Step 2: Convert to fraction form
    655,611.70/983,417.55 = 578,629.30/x
  3. Step 3: Cross multiply
    655,611.70x = 983,417.55 × 578,629.30
  4. Step 4: Simplify right side
    655,611.70x = 569,034,208,564.22
  5. Step 5: Solve for x
    x = 569,034,208,564.22/655,611.70
  6. Step 6: Final answer
    x = 867,943.95

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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.