Home / 401,416.16-553,909.20-231,706.40

Finding the Fourth Proportional to 401,416.16, 553,909.20 and 231,706.40

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Solution

The fourth proportional to 401,416.16, 553,909.20 and 231,706.40 is: 319,728.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,416.16 : 553,909.20 = 231,706.40 : x
  2. Step 2: Convert to fraction form
    401,416.16/553,909.20 = 231,706.40/x
  3. Step 3: Cross multiply
    401,416.16x = 553,909.20 × 231,706.40
  4. Step 4: Simplify right side
    401,416.16x = 128,344,306,658.88
  5. Step 5: Solve for x
    x = 128,344,306,658.88/401,416.16
  6. Step 6: Final answer
    x = 319,728.80

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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.