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Finding the Fourth Proportional to 506,690.78, 760,009.64 and 127,611.32

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Solution

The fourth proportional to 506,690.78, 760,009.64 and 127,611.32 is: 191,410.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    506,690.78 : 760,009.64 = 127,611.32 : x
  2. Step 2: Convert to fraction form
    506,690.78/760,009.64 = 127,611.32/x
  3. Step 3: Cross multiply
    506,690.78x = 760,009.64 × 127,611.32
  4. Step 4: Simplify right side
    506,690.78x = 96,985,828,935.02
  5. Step 5: Solve for x
    x = 96,985,828,935.02/506,690.78
  6. Step 6: Final answer
    x = 191,410.29

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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.