Home / 685,690.49-1,028,956.13-306,931.48

Finding the Fourth Proportional to 685,690.49, 1,028,956.13 and 306,931.48

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Solution

The fourth proportional to 685,690.49, 1,028,956.13 and 306,931.48 is: 460,585.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,690.49 : 1,028,956.13 = 306,931.48 : x
  2. Step 2: Convert to fraction form
    685,690.49/1,028,956.13 = 306,931.48/x
  3. Step 3: Cross multiply
    685,690.49x = 1,028,956.13 × 306,931.48
  4. Step 4: Simplify right side
    685,690.49x = 315,819,026,030.91
  5. Step 5: Solve for x
    x = 315,819,026,030.91/685,690.49
  6. Step 6: Final answer
    x = 460,585.40

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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.