Home / 765,885.78-1,056,880.98-421,654.68

Finding the Fourth Proportional to 765,885.78, 1,056,880.98 and 421,654.68

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Solution

The fourth proportional to 765,885.78, 1,056,880.98 and 421,654.68 is: 581,860.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    765,885.78 : 1,056,880.98 = 421,654.68 : x
  2. Step 2: Convert to fraction form
    765,885.78/1,056,880.98 = 421,654.68/x
  3. Step 3: Cross multiply
    765,885.78x = 1,056,880.98 × 421,654.68
  4. Step 4: Simplify right side
    765,885.78x = 445,638,811,419.99
  5. Step 5: Solve for x
    x = 445,638,811,419.99/765,885.78
  6. Step 6: Final answer
    x = 581,860.67

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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.