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Finding the Fourth Proportional to 647,564.70, 971,347.05 and 423,615.90

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Solution

The fourth proportional to 647,564.70, 971,347.05 and 423,615.90 is: 635,423.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,564.70 : 971,347.05 = 423,615.90 : x
  2. Step 2: Convert to fraction form
    647,564.70/971,347.05 = 423,615.90/x
  3. Step 3: Cross multiply
    647,564.70x = 971,347.05 × 423,615.90
  4. Step 4: Simplify right side
    647,564.70x = 411,478,054,798.10
  5. Step 5: Solve for x
    x = 411,478,054,798.10/647,564.70
  6. Step 6: Final answer
    x = 635,423.85

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Similar ratio
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.