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Finding the Fourth Proportional to 680,710.80, 1,021,066.20 and 648,051.60

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Solution

The fourth proportional to 680,710.80, 1,021,066.20 and 648,051.60 is: 972,077.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,710.80 : 1,021,066.20 = 648,051.60 : x
  2. Step 2: Convert to fraction form
    680,710.80/1,021,066.20 = 648,051.60/x
  3. Step 3: Cross multiply
    680,710.80x = 1,021,066.20 × 648,051.60
  4. Step 4: Simplify right side
    680,710.80x = 661,703,584,615.92
  5. Step 5: Solve for x
    x = 661,703,584,615.92/680,710.80
  6. Step 6: Final answer
    x = 972,077.40

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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.