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Finding the Fourth Proportional to 550,655.36, 760,120.52 and 390,348.32

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Solution

The fourth proportional to 550,655.36, 760,120.52 and 390,348.32 is: 538,833.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    550,655.36 : 760,120.52 = 390,348.32 : x
  2. Step 2: Convert to fraction form
    550,655.36/760,120.52 = 390,348.32/x
  3. Step 3: Cross multiply
    550,655.36x = 760,120.52 × 390,348.32
  4. Step 4: Simplify right side
    550,655.36x = 296,711,767,979.53
  5. Step 5: Solve for x
    x = 296,711,767,979.53/550,655.36
  6. Step 6: Final answer
    x = 538,833.89

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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.