Home / 671,399.60-1,005,025.80-390,081.20

Finding the Fourth Proportional to 671,399.60, 1,005,025.80 and 390,081.20

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Solution

The fourth proportional to 671,399.60, 1,005,025.80 and 390,081.20 is: 583,917.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    671,399.60 : 1,005,025.80 = 390,081.20 : x
  2. Step 2: Convert to fraction form
    671,399.60/1,005,025.80 = 390,081.20/x
  3. Step 3: Cross multiply
    671,399.60x = 1,005,025.80 × 390,081.20
  4. Step 4: Simplify right side
    671,399.60x = 392,041,670,094.96
  5. Step 5: Solve for x
    x = 392,041,670,094.96/671,399.60
  6. Step 6: Final answer
    x = 583,917.04

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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.