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Finding the Fourth Proportional to 353,447.80, 530,171.70 and 315,065.95

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Solution

The fourth proportional to 353,447.80, 530,171.70 and 315,065.95 is: 472,598.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,447.80 : 530,171.70 = 315,065.95 : x
  2. Step 2: Convert to fraction form
    353,447.80/530,171.70 = 315,065.95/x
  3. Step 3: Cross multiply
    353,447.80x = 530,171.70 × 315,065.95
  4. Step 4: Simplify right side
    353,447.80x = 167,039,050,323.62
  5. Step 5: Solve for x
    x = 167,039,050,323.62/353,447.80
  6. Step 6: Final answer
    x = 472,598.93

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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.