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Finding the Fourth Proportional to 620,390.55, 869,727.75 and 620,390.55

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Solution

The fourth proportional to 620,390.55, 869,727.75 and 620,390.55 is: 869,727.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,390.55 : 869,727.75 = 620,390.55 : x
  2. Step 2: Convert to fraction form
    620,390.55/869,727.75 = 620,390.55/x
  3. Step 3: Cross multiply
    620,390.55x = 869,727.75 × 620,390.55
  4. Step 4: Simplify right side
    620,390.55x = 539,570,877,172.76
  5. Step 5: Solve for x
    x = 539,570,877,172.76/620,390.55
  6. Step 6: Final answer
    x = 869,727.75

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.