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Finding the Fourth Proportional to 285,421.01, 393,881.16 and 156,364.17

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Solution

The fourth proportional to 285,421.01, 393,881.16 and 156,364.17 is: 215,782.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,421.01 : 393,881.16 = 156,364.17 : x
  2. Step 2: Convert to fraction form
    285,421.01/393,881.16 = 156,364.17/x
  3. Step 3: Cross multiply
    285,421.01x = 393,881.16 × 156,364.17
  4. Step 4: Simplify right side
    285,421.01x = 61,588,899,880.22
  5. Step 5: Solve for x
    x = 61,588,899,880.22/285,421.01
  6. Step 6: Final answer
    x = 215,782.65

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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.