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Finding the Fourth Proportional to 587,600.30, 881,400.45 and 421,712.30

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Solution

The fourth proportional to 587,600.30, 881,400.45 and 421,712.30 is: 632,568.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    587,600.30 : 881,400.45 = 421,712.30 : x
  2. Step 2: Convert to fraction form
    587,600.30/881,400.45 = 421,712.30/x
  3. Step 3: Cross multiply
    587,600.30x = 881,400.45 × 421,712.30
  4. Step 4: Simplify right side
    587,600.30x = 371,697,410,990.54
  5. Step 5: Solve for x
    x = 371,697,410,990.54/587,600.30
  6. Step 6: Final answer
    x = 632,568.45

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Double scale
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Similar ratio
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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.