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Finding the Fourth Proportional to 999,307.60, 1,497,211.80 and 820,848.40

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Solution

The fourth proportional to 999,307.60, 1,497,211.80 and 820,848.40 is: 1,229,835.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    999,307.60 : 1,497,211.80 = 820,848.40 : x
  2. Step 2: Convert to fraction form
    999,307.60/1,497,211.80 = 820,848.40/x
  3. Step 3: Cross multiply
    999,307.60x = 1,497,211.80 × 820,848.40
  4. Step 4: Simplify right side
    999,307.60x = 1,228,983,910,491.12
  5. Step 5: Solve for x
    x = 1,228,983,910,491.12/999,307.60
  6. Step 6: Final answer
    x = 1,229,835.45

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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.