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Finding the Fourth Proportional to 647,493.60, 972,406.80 and 626,498.40

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Solution

The fourth proportional to 647,493.60, 972,406.80 and 626,498.40 is: 940,876.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,493.60 : 972,406.80 = 626,498.40 : x
  2. Step 2: Convert to fraction form
    647,493.60/972,406.80 = 626,498.40/x
  3. Step 3: Cross multiply
    647,493.60x = 972,406.80 × 626,498.40
  4. Step 4: Simplify right side
    647,493.60x = 609,211,304,349.12
  5. Step 5: Solve for x
    x = 609,211,304,349.12/647,493.60
  6. Step 6: Final answer
    x = 940,876.18

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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.