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Finding the Fourth Proportional to 647,425.55, 894,011.40 and 406,122.90

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Solution

The fourth proportional to 647,425.55, 894,011.40 and 406,122.90 is: 560,803.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,425.55 : 894,011.40 = 406,122.90 : x
  2. Step 2: Convert to fraction form
    647,425.55/894,011.40 = 406,122.90/x
  3. Step 3: Cross multiply
    647,425.55x = 894,011.40 × 406,122.90
  4. Step 4: Simplify right side
    647,425.55x = 363,078,502,401.06
  5. Step 5: Solve for x
    x = 363,078,502,401.06/647,425.55
  6. Step 6: Final answer
    x = 560,803.48

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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.