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Finding the Fourth Proportional to 306,711.55, 423,281.28 and 185,863.42

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Solution

The fourth proportional to 306,711.55, 423,281.28 and 185,863.42 is: 256,503.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,711.55 : 423,281.28 = 185,863.42 : x
  2. Step 2: Convert to fraction form
    306,711.55/423,281.28 = 185,863.42/x
  3. Step 3: Cross multiply
    306,711.55x = 423,281.28 × 185,863.42
  4. Step 4: Simplify right side
    306,711.55x = 78,672,506,322.78
  5. Step 5: Solve for x
    x = 78,672,506,322.78/306,711.55
  6. Step 6: Final answer
    x = 256,503.24

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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.