Home / 621,830.86-858,050.29-392,301.58

Finding the Fourth Proportional to 621,830.86, 858,050.29 and 392,301.58

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Solution

The fourth proportional to 621,830.86, 858,050.29 and 392,301.58 is: 541,328.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,830.86 : 858,050.29 = 392,301.58 : x
  2. Step 2: Convert to fraction form
    621,830.86/858,050.29 = 392,301.58/x
  3. Step 3: Cross multiply
    621,830.86x = 858,050.29 × 392,301.58
  4. Step 4: Simplify right side
    621,830.86x = 336,614,484,486.46
  5. Step 5: Solve for x
    x = 336,614,484,486.46/621,830.86
  6. Step 6: Final answer
    x = 541,328.05

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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.