Home / 328,320.48-492,188.40-128,783.28

Finding the Fourth Proportional to 328,320.48, 492,188.40 and 128,783.28

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Solution

The fourth proportional to 328,320.48, 492,188.40 and 128,783.28 is: 193,060.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,320.48 : 492,188.40 = 128,783.28 : x
  2. Step 2: Convert to fraction form
    328,320.48/492,188.40 = 128,783.28/x
  3. Step 3: Cross multiply
    328,320.48x = 492,188.40 × 128,783.28
  4. Step 4: Simplify right side
    328,320.48x = 63,385,636,529.95
  5. Step 5: Solve for x
    x = 63,385,636,529.95/328,320.48
  6. Step 6: Final answer
    x = 193,060.26

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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.