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Finding the Fourth Proportional to 287,951,740.40, 431,927,610.60 and 265,780,809.20

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Solution

The fourth proportional to 287,951,740.40, 431,927,610.60 and 265,780,809.20 is: 398,671,213.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,951,740.40 : 431,927,610.60 = 265,780,809.20 : x
  2. Step 2: Convert to fraction form
    287,951,740.40/431,927,610.60 = 265,780,809.20/x
  3. Step 3: Cross multiply
    287,951,740.40x = 431,927,610.60 × 265,780,809.20
  4. Step 4: Simplify right side
    287,951,740.40x = 114,798,069,861,090,496
  5. Step 5: Solve for x
    x = 114,798,069,861,090,496/287,951,740.40
  6. Step 6: Final answer
    x = 398,671,213.80

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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.