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Finding the Fourth Proportional to 921,294, 1,271,425.20 and 513,396.40

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Solution

The fourth proportional to 921,294, 1,271,425.20 and 513,396.40 is: 708,509.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,294 : 1,271,425.20 = 513,396.40 : x
  2. Step 2: Convert to fraction form
    921,294/1,271,425.20 = 513,396.40/x
  3. Step 3: Cross multiply
    921,294x = 1,271,425.20 × 513,396.40
  4. Step 4: Simplify right side
    921,294x = 652,745,120,549.28
  5. Step 5: Solve for x
    x = 652,745,120,549.28/921,294
  6. Step 6: Final answer
    x = 708,509.03

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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.