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Finding the Fourth Proportional to 355,646.80, 532,822.20 and 281,256.40

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Solution

The fourth proportional to 355,646.80, 532,822.20 and 281,256.40 is: 421,372.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,646.80 : 532,822.20 = 281,256.40 : x
  2. Step 2: Convert to fraction form
    355,646.80/532,822.20 = 281,256.40/x
  3. Step 3: Cross multiply
    355,646.80x = 532,822.20 × 281,256.40
  4. Step 4: Simplify right side
    355,646.80x = 149,859,653,812.08
  5. Step 5: Solve for x
    x = 149,859,653,812.08/355,646.80
  6. Step 6: Final answer
    x = 421,372.14

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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.