Home / 356,268.08-492,275.40-280,390.16

Finding the Fourth Proportional to 356,268.08, 492,275.40 and 280,390.16

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Solution

The fourth proportional to 356,268.08, 492,275.40 and 280,390.16 is: 387,430.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,268.08 : 492,275.40 = 280,390.16 : x
  2. Step 2: Convert to fraction form
    356,268.08/492,275.40 = 280,390.16/x
  3. Step 3: Cross multiply
    356,268.08x = 492,275.40 × 280,390.16
  4. Step 4: Simplify right side
    356,268.08x = 138,029,178,170.06
  5. Step 5: Solve for x
    x = 138,029,178,170.06/356,268.08
  6. Step 6: Final answer
    x = 387,430.66

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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.