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Finding the Fourth Proportional to 710,031.40, 979,287.78 and 455,405.80

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Solution

The fourth proportional to 710,031.40, 979,287.78 and 455,405.80 is: 628,103.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,031.40 : 979,287.78 = 455,405.80 : x
  2. Step 2: Convert to fraction form
    710,031.40/979,287.78 = 455,405.80/x
  3. Step 3: Cross multiply
    710,031.40x = 979,287.78 × 455,405.80
  4. Step 4: Simplify right side
    710,031.40x = 445,973,334,881.12
  5. Step 5: Solve for x
    x = 445,973,334,881.12/710,031.40
  6. Step 6: Final answer
    x = 628,103.68

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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.