Home / 400,780.02-553,451.10-257,788.30

Finding the Fourth Proportional to 400,780.02, 553,451.10 and 257,788.30

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Solution

The fourth proportional to 400,780.02, 553,451.10 and 257,788.30 is: 355,988.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,780.02 : 553,451.10 = 257,788.30 : x
  2. Step 2: Convert to fraction form
    400,780.02/553,451.10 = 257,788.30/x
  3. Step 3: Cross multiply
    400,780.02x = 553,451.10 × 257,788.30
  4. Step 4: Simplify right side
    400,780.02x = 142,673,218,202.13
  5. Step 5: Solve for x
    x = 142,673,218,202.13/400,780.02
  6. Step 6: Final answer
    x = 355,988.85

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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.