Home / 346,939.20-520,408.80-213,386.40

Finding the Fourth Proportional to 346,939.20, 520,408.80 and 213,386.40

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Solution

The fourth proportional to 346,939.20, 520,408.80 and 213,386.40 is: 320,079.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,939.20 : 520,408.80 = 213,386.40 : x
  2. Step 2: Convert to fraction form
    346,939.20/520,408.80 = 213,386.40/x
  3. Step 3: Cross multiply
    346,939.20x = 520,408.80 × 213,386.40
  4. Step 4: Simplify right side
    346,939.20x = 111,048,160,360.32
  5. Step 5: Solve for x
    x = 111,048,160,360.32/346,939.20
  6. Step 6: Final answer
    x = 320,079.60

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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.