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Finding the Fourth Proportional to 387,287.80, 580,931.70 and 162,901.60

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Solution

The fourth proportional to 387,287.80, 580,931.70 and 162,901.60 is: 244,352.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,287.80 : 580,931.70 = 162,901.60 : x
  2. Step 2: Convert to fraction form
    387,287.80/580,931.70 = 162,901.60/x
  3. Step 3: Cross multiply
    387,287.80x = 580,931.70 × 162,901.60
  4. Step 4: Simplify right side
    387,287.80x = 94,634,703,420.72
  5. Step 5: Solve for x
    x = 94,634,703,420.72/387,287.80
  6. Step 6: Final answer
    x = 244,352.40

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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.