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Finding the Fourth Proportional to 554,417.64, 765,122.40 and 312,695.10

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Solution

The fourth proportional to 554,417.64, 765,122.40 and 312,695.10 is: 431,533.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,417.64 : 765,122.40 = 312,695.10 : x
  2. Step 2: Convert to fraction form
    554,417.64/765,122.40 = 312,695.10/x
  3. Step 3: Cross multiply
    554,417.64x = 765,122.40 × 312,695.10
  4. Step 4: Simplify right side
    554,417.64x = 239,250,025,380.24
  5. Step 5: Solve for x
    x = 239,250,025,380.24/554,417.64
  6. Step 6: Final answer
    x = 431,533.93

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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.