Home / 305,338.20-458,007.30-128,045.40

Finding the Fourth Proportional to 305,338.20, 458,007.30 and 128,045.40

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Solution

The fourth proportional to 305,338.20, 458,007.30 and 128,045.40 is: 192,068.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,338.20 : 458,007.30 = 128,045.40 : x
  2. Step 2: Convert to fraction form
    305,338.20/458,007.30 = 128,045.40/x
  3. Step 3: Cross multiply
    305,338.20x = 458,007.30 × 128,045.40
  4. Step 4: Simplify right side
    305,338.20x = 58,645,727,931.42
  5. Step 5: Solve for x
    x = 58,645,727,931.42/305,338.20
  6. Step 6: Final answer
    x = 192,068.10

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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.