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Finding the Fourth Proportional to 554,486.08, 765,173.58 and 312,765.16

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Solution

The fourth proportional to 554,486.08, 765,173.58 and 312,765.16 is: 431,606.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,486.08 : 765,173.58 = 312,765.16 : x
  2. Step 2: Convert to fraction form
    554,486.08/765,173.58 = 312,765.16/x
  3. Step 3: Cross multiply
    554,486.08x = 765,173.58 × 312,765.16
  4. Step 4: Simplify right side
    554,486.08x = 239,319,637,176.47
  5. Step 5: Solve for x
    x = 239,319,637,176.47/554,486.08
  6. Step 6: Final answer
    x = 431,606.21

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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.