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Finding the Fourth Proportional to 387,415.40, 581,030.58 and 162,780.08

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Solution

The fourth proportional to 387,415.40, 581,030.58 and 162,780.08 is: 244,131.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,415.40 : 581,030.58 = 162,780.08 : x
  2. Step 2: Convert to fraction form
    387,415.40/581,030.58 = 162,780.08/x
  3. Step 3: Cross multiply
    387,415.40x = 581,030.58 × 162,780.08
  4. Step 4: Simplify right side
    387,415.40x = 94,580,204,294.85
  5. Step 5: Solve for x
    x = 94,580,204,294.85/387,415.40
  6. Step 6: Final answer
    x = 244,131.25

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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.