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Finding the Fourth Proportional to 554,855.69, 765,722.58 and 313,146.71

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Solution

The fourth proportional to 554,855.69, 765,722.58 and 313,146.71 is: 432,154.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,855.69 : 765,722.58 = 313,146.71 : x
  2. Step 2: Convert to fraction form
    554,855.69/765,722.58 = 313,146.71/x
  3. Step 3: Cross multiply
    554,855.69x = 765,722.58 × 313,146.71
  4. Step 4: Simplify right side
    554,855.69x = 239,783,506,699.71
  5. Step 5: Solve for x
    x = 239,783,506,699.71/554,855.69
  6. Step 6: Final answer
    x = 432,154.72

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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.