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Finding the Fourth Proportional to 405,900,331.04, 608,848,780.08 and 147,054,862.88

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Solution

The fourth proportional to 405,900,331.04, 608,848,780.08 and 147,054,862.88 is: 220,581,672.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,900,331.04 : 608,848,780.08 = 147,054,862.88 : x
  2. Step 2: Convert to fraction form
    405,900,331.04/608,848,780.08 = 147,054,862.88/x
  3. Step 3: Cross multiply
    405,900,331.04x = 608,848,780.08 × 147,054,862.88
  4. Step 4: Simplify right side
    405,900,331.04x = 89,534,173,869,319,680
  5. Step 5: Solve for x
    x = 89,534,173,869,319,680/405,900,331.04
  6. Step 6: Final answer
    x = 220,581,672.45

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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.