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Finding the Fourth Proportional to 710,615.20, 1,064,540.40 and 429,296.80

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Solution

The fourth proportional to 710,615.20, 1,064,540.40 and 429,296.80 is: 643,110.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,615.20 : 1,064,540.40 = 429,296.80 : x
  2. Step 2: Convert to fraction form
    710,615.20/1,064,540.40 = 429,296.80/x
  3. Step 3: Cross multiply
    710,615.20x = 1,064,540.40 × 429,296.80
  4. Step 4: Simplify right side
    710,615.20x = 457,003,787,190.72
  5. Step 5: Solve for x
    x = 457,003,787,190.72/710,615.20
  6. Step 6: Final answer
    x = 643,110.06

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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.