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Finding the Fourth Proportional to 472,539.80, 707,643.30 and 313,909.40

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Solution

The fourth proportional to 472,539.80, 707,643.30 and 313,909.40 is: 470,089.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    472,539.80 : 707,643.30 = 313,909.40 : x
  2. Step 2: Convert to fraction form
    472,539.80/707,643.30 = 313,909.40/x
  3. Step 3: Cross multiply
    472,539.80x = 707,643.30 × 313,909.40
  4. Step 4: Simplify right side
    472,539.80x = 222,135,883,717.02
  5. Step 5: Solve for x
    x = 222,135,883,717.02/472,539.80
  6. Step 6: Final answer
    x = 470,089.26

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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.