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Finding the Fourth Proportional to 472,780.80, 710,920.80 and 395,798.40

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Solution

The fourth proportional to 472,780.80, 710,920.80 and 395,798.40 is: 595,162.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    472,780.80 : 710,920.80 = 395,798.40 : x
  2. Step 2: Convert to fraction form
    472,780.80/710,920.80 = 395,798.40/x
  3. Step 3: Cross multiply
    472,780.80x = 710,920.80 × 395,798.40
  4. Step 4: Simplify right side
    472,780.80x = 281,381,315,166.72
  5. Step 5: Solve for x
    x = 281,381,315,166.72/472,780.80
  6. Step 6: Final answer
    x = 595,162.31

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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.