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Finding the Fourth Proportional to 355,513.80, 490,639.38 and 202,598.76

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Solution

The fourth proportional to 355,513.80, 490,639.38 and 202,598.76 is: 279,603.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,513.80 : 490,639.38 = 202,598.76 : x
  2. Step 2: Convert to fraction form
    355,513.80/490,639.38 = 202,598.76/x
  3. Step 3: Cross multiply
    355,513.80x = 490,639.38 × 202,598.76
  4. Step 4: Simplify right side
    355,513.80x = 99,402,929,995.17
  5. Step 5: Solve for x
    x = 99,402,929,995.17/355,513.80
  6. Step 6: Final answer
    x = 279,603.58

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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.