Home / 420,210.30-579,894.42-229,227.72

Finding the Fourth Proportional to 420,210.30, 579,894.42 and 229,227.72

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Solution

The fourth proportional to 420,210.30, 579,894.42 and 229,227.72 is: 316,336.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,210.30 : 579,894.42 = 229,227.72 : x
  2. Step 2: Convert to fraction form
    420,210.30/579,894.42 = 229,227.72/x
  3. Step 3: Cross multiply
    420,210.30x = 579,894.42 × 229,227.72
  4. Step 4: Simplify right side
    420,210.30x = 132,927,875,737.32
  5. Step 5: Solve for x
    x = 132,927,875,737.32/420,210.30
  6. Step 6: Final answer
    x = 316,336.55

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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.