Home / 677,929.29-935,980.65-420,079.86

Finding the Fourth Proportional to 677,929.29, 935,980.65 and 420,079.86

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Solution

The fourth proportional to 677,929.29, 935,980.65 and 420,079.86 is: 579,981.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,929.29 : 935,980.65 = 420,079.86 : x
  2. Step 2: Convert to fraction form
    677,929.29/935,980.65 = 420,079.86/x
  3. Step 3: Cross multiply
    677,929.29x = 935,980.65 × 420,079.86
  4. Step 4: Simplify right side
    677,929.29x = 393,186,620,414.71
  5. Step 5: Solve for x
    x = 393,186,620,414.71/677,929.29
  6. Step 6: Final answer
    x = 579,981.76

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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.