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Finding the Fourth Proportional to 387,015.30, 579,538.80 and 369,300.60

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Solution

The fourth proportional to 387,015.30, 579,538.80 and 369,300.60 is: 553,011.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,015.30 : 579,538.80 = 369,300.60 : x
  2. Step 2: Convert to fraction form
    387,015.30/579,538.80 = 369,300.60/x
  3. Step 3: Cross multiply
    387,015.30x = 579,538.80 × 369,300.60
  4. Step 4: Simplify right side
    387,015.30x = 214,024,026,563.28
  5. Step 5: Solve for x
    x = 214,024,026,563.28/387,015.30
  6. Step 6: Final answer
    x = 553,011.80

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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.