Home / 426,128.47-638,368.45-356,918.31

Finding the Fourth Proportional to 426,128.47, 638,368.45 and 356,918.31

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Solution

The fourth proportional to 426,128.47, 638,368.45 and 356,918.31 is: 534,687.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,128.47 : 638,368.45 = 356,918.31 : x
  2. Step 2: Convert to fraction form
    426,128.47/638,368.45 = 356,918.31/x
  3. Step 3: Cross multiply
    426,128.47x = 638,368.45 × 356,918.31
  4. Step 4: Simplify right side
    426,128.47x = 227,845,387,439.02
  5. Step 5: Solve for x
    x = 227,845,387,439.02/426,128.47
  6. Step 6: Final answer
    x = 534,687.08

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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.