Home / 661,528.15-912,948.67-389,777.16

Finding the Fourth Proportional to 661,528.15, 912,948.67 and 389,777.16

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Solution

The fourth proportional to 661,528.15, 912,948.67 and 389,777.16 is: 537,915.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,528.15 : 912,948.67 = 389,777.16 : x
  2. Step 2: Convert to fraction form
    661,528.15/912,948.67 = 389,777.16/x
  3. Step 3: Cross multiply
    661,528.15x = 912,948.67 × 389,777.16
  4. Step 4: Simplify right side
    661,528.15x = 355,846,543,729.16
  5. Step 5: Solve for x
    x = 355,846,543,729.16/661,528.15
  6. Step 6: Final answer
    x = 537,915.95

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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.