Home / 921,503.07-1,271,680.15-513,630.81

Finding the Fourth Proportional to 921,503.07, 1,271,680.15 and 513,630.81

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Solution

The fourth proportional to 921,503.07, 1,271,680.15 and 513,630.81 is: 708,813.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,503.07 : 1,271,680.15 = 513,630.81 : x
  2. Step 2: Convert to fraction form
    921,503.07/1,271,680.15 = 513,630.81/x
  3. Step 3: Cross multiply
    921,503.07x = 1,271,680.15 × 513,630.81
  4. Step 4: Simplify right side
    921,503.07x = 653,174,105,505.42
  5. Step 5: Solve for x
    x = 653,174,105,505.42/921,503.07
  6. Step 6: Final answer
    x = 708,813.81

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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.