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Finding the Fourth Proportional to 554,688.48, 765,412.56 and 312,984.48

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Solution

The fourth proportional to 554,688.48, 765,412.56 and 312,984.48 is: 431,886.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,688.48 : 765,412.56 = 312,984.48 : x
  2. Step 2: Convert to fraction form
    554,688.48/765,412.56 = 312,984.48/x
  3. Step 3: Cross multiply
    554,688.48x = 765,412.56 × 312,984.48
  4. Step 4: Simplify right side
    554,688.48x = 239,562,252,077.07
  5. Step 5: Solve for x
    x = 239,562,252,077.07/554,688.48
  6. Step 6: Final answer
    x = 431,886.11

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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.