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Finding the Fourth Proportional to 328,710.30, 493,065.45 and 210,612.30

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Solution

The fourth proportional to 328,710.30, 493,065.45 and 210,612.30 is: 315,918.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,710.30 : 493,065.45 = 210,612.30 : x
  2. Step 2: Convert to fraction form
    328,710.30/493,065.45 = 210,612.30/x
  3. Step 3: Cross multiply
    328,710.30x = 493,065.45 × 210,612.30
  4. Step 4: Simplify right side
    328,710.30x = 103,845,648,475.04
  5. Step 5: Solve for x
    x = 103,845,648,475.04/328,710.30
  6. Step 6: Final answer
    x = 315,918.45

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Similar ratio
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1.5x scale

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.