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Finding the Fourth Proportional to 778,556.40, 1,168,007.40 and 357,730.80

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Solution

The fourth proportional to 778,556.40, 1,168,007.40 and 357,730.80 is: 536,675.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,556.40 : 1,168,007.40 = 357,730.80 : x
  2. Step 2: Convert to fraction form
    778,556.40/1,168,007.40 = 357,730.80/x
  3. Step 3: Cross multiply
    778,556.40x = 1,168,007.40 × 357,730.80
  4. Step 4: Simplify right side
    778,556.40x = 417,832,221,607.92
  5. Step 5: Solve for x
    x = 417,832,221,607.92/778,556.40
  6. Step 6: Final answer
    x = 536,675.60

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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.