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Finding the Fourth Proportional to 423,009.20, 634,513.80 and 403,326.20

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Solution

The fourth proportional to 423,009.20, 634,513.80 and 403,326.20 is: 604,989.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,009.20 : 634,513.80 = 403,326.20 : x
  2. Step 2: Convert to fraction form
    423,009.20/634,513.80 = 403,326.20/x
  3. Step 3: Cross multiply
    423,009.20x = 634,513.80 × 403,326.20
  4. Step 4: Simplify right side
    423,009.20x = 255,916,039,801.56
  5. Step 5: Solve for x
    x = 255,916,039,801.56/423,009.20
  6. Step 6: Final answer
    x = 604,989.30

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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.