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Finding the Fourth Proportional to 501,543.19, 692,129.61 and 286,687.91

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Solution

The fourth proportional to 501,543.19, 692,129.61 and 286,687.91 is: 395,629.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    501,543.19 : 692,129.61 = 286,687.91 : x
  2. Step 2: Convert to fraction form
    501,543.19/692,129.61 = 286,687.91/x
  3. Step 3: Cross multiply
    501,543.19x = 692,129.61 × 286,687.91
  4. Step 4: Simplify right side
    501,543.19x = 198,425,189,177.11
  5. Step 5: Solve for x
    x = 198,425,189,177.11/501,543.19
  6. Step 6: Final answer
    x = 395,629.31

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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.