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Finding the Fourth Proportional to 881,686.80, 1,323,221.40 and 408,430.80

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Solution

The fourth proportional to 881,686.80, 1,323,221.40 and 408,430.80 is: 612,966.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    881,686.80 : 1,323,221.40 = 408,430.80 : x
  2. Step 2: Convert to fraction form
    881,686.80/1,323,221.40 = 408,430.80/x
  3. Step 3: Cross multiply
    881,686.80x = 1,323,221.40 × 408,430.80
  4. Step 4: Simplify right side
    881,686.80x = 540,444,374,979.12
  5. Step 5: Solve for x
    x = 540,444,374,979.12/881,686.80
  6. Step 6: Final answer
    x = 612,966.39

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1.5x scale

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.