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Finding the Fourth Proportional to 713,785.52, 985,051.60 and 391,509.20

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Solution

The fourth proportional to 713,785.52, 985,051.60 and 391,509.20 is: 540,297.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,785.52 : 985,051.60 = 391,509.20 : x
  2. Step 2: Convert to fraction form
    713,785.52/985,051.60 = 391,509.20/x
  3. Step 3: Cross multiply
    713,785.52x = 985,051.60 × 391,509.20
  4. Step 4: Simplify right side
    713,785.52x = 385,656,763,874.72
  5. Step 5: Solve for x
    x = 385,656,763,874.72/713,785.52
  6. Step 6: Final answer
    x = 540,297.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.