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Finding the Fourth Proportional to 891,636.80, 1,230,458.58 and 509,671.80

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Solution

The fourth proportional to 891,636.80, 1,230,458.58 and 509,671.80 is: 703,346.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    891,636.80 : 1,230,458.58 = 509,671.80 : x
  2. Step 2: Convert to fraction form
    891,636.80/1,230,458.58 = 509,671.80/x
  3. Step 3: Cross multiply
    891,636.80x = 1,230,458.58 × 509,671.80
  4. Step 4: Simplify right side
    891,636.80x = 627,130,039,294.04
  5. Step 5: Solve for x
    x = 627,130,039,294.04/891,636.80
  6. Step 6: Final answer
    x = 703,346.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.