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Finding the Fourth Proportional to 285,758.18, 428,660.64 and 143,530.32

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Solution

The fourth proportional to 285,758.18, 428,660.64 and 143,530.32 is: 215,307.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,758.18 : 428,660.64 = 143,530.32 : x
  2. Step 2: Convert to fraction form
    285,758.18/428,660.64 = 143,530.32/x
  3. Step 3: Cross multiply
    285,758.18x = 428,660.64 × 143,530.32
  4. Step 4: Simplify right side
    285,758.18x = 61,525,798,830.60
  5. Step 5: Solve for x
    x = 61,525,798,830.60/285,758.18
  6. Step 6: Final answer
    x = 215,307.22

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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.