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Finding the Fourth Proportional to 993,762.60, 1,488,894.30 and 815,303.40

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Solution

The fourth proportional to 993,762.60, 1,488,894.30 and 815,303.40 is: 1,221,519.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    993,762.60 : 1,488,894.30 = 815,303.40 : x
  2. Step 2: Convert to fraction form
    993,762.60/1,488,894.30 = 815,303.40/x
  3. Step 3: Cross multiply
    993,762.60x = 1,488,894.30 × 815,303.40
  4. Step 4: Simplify right side
    993,762.60x = 1,213,900,585,030.62
  5. Step 5: Solve for x
    x = 1,213,900,585,030.62/993,762.60
  6. Step 6: Final answer
    x = 1,221,519.69

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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.