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Finding the Fourth Proportional to 656,999.40, 983,655.90 and 638,567.40

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Solution

The fourth proportional to 656,999.40, 983,655.90 and 638,567.40 is: 956,059.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,999.40 : 983,655.90 = 638,567.40 : x
  2. Step 2: Convert to fraction form
    656,999.40/983,655.90 = 638,567.40/x
  3. Step 3: Cross multiply
    656,999.40x = 983,655.90 × 638,567.40
  4. Step 4: Simplify right side
    656,999.40x = 628,130,590,557.66
  5. Step 5: Solve for x
    x = 628,130,590,557.66/656,999.40
  6. Step 6: Final answer
    x = 956,059.61

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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.