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Finding the Fourth Proportional to 387,079.40, 580,619.10 and 328,176.20

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Solution

The fourth proportional to 387,079.40, 580,619.10 and 328,176.20 is: 492,264.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,079.40 : 580,619.10 = 328,176.20 : x
  2. Step 2: Convert to fraction form
    387,079.40/580,619.10 = 328,176.20/x
  3. Step 3: Cross multiply
    387,079.40x = 580,619.10 × 328,176.20
  4. Step 4: Simplify right side
    387,079.40x = 190,545,369,885.42
  5. Step 5: Solve for x
    x = 190,545,369,885.42/387,079.40
  6. Step 6: Final answer
    x = 492,264.30

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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.