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Finding the Fourth Proportional to 661,428.68, 912,770.34 and 359,621.96

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Solution

The fourth proportional to 661,428.68, 912,770.34 and 359,621.96 is: 496,277.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,428.68 : 912,770.34 = 359,621.96 : x
  2. Step 2: Convert to fraction form
    661,428.68/912,770.34 = 359,621.96/x
  3. Step 3: Cross multiply
    661,428.68x = 912,770.34 × 359,621.96
  4. Step 4: Simplify right side
    661,428.68x = 328,252,258,700.67
  5. Step 5: Solve for x
    x = 328,252,258,700.67/661,428.68
  6. Step 6: Final answer
    x = 496,277.63

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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.