Home / 429,701.76-643,921.74-216,176.18

Finding the Fourth Proportional to 429,701.76, 643,921.74 and 216,176.18

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Solution

The fourth proportional to 429,701.76, 643,921.74 and 216,176.18 is: 323,946.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,701.76 : 643,921.74 = 216,176.18 : x
  2. Step 2: Convert to fraction form
    429,701.76/643,921.74 = 216,176.18/x
  3. Step 3: Cross multiply
    429,701.76x = 643,921.74 × 216,176.18
  4. Step 4: Simplify right side
    429,701.76x = 139,200,541,972.15
  5. Step 5: Solve for x
    x = 139,200,541,972.15/429,701.76
  6. Step 6: Final answer
    x = 323,946.87

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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.