Home / 421,454.20-630,626.10-384,129.40

Finding the Fourth Proportional to 421,454.20, 630,626.10 and 384,129.40

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Solution

The fourth proportional to 421,454.20, 630,626.10 and 384,129.40 is: 574,776.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,454.20 : 630,626.10 = 384,129.40 : x
  2. Step 2: Convert to fraction form
    421,454.20/630,626.10 = 384,129.40/x
  3. Step 3: Cross multiply
    421,454.20x = 630,626.10 × 384,129.40
  4. Step 4: Simplify right side
    421,454.20x = 242,242,025,417.34
  5. Step 5: Solve for x
    x = 242,242,025,417.34/421,454.20
  6. Step 6: Final answer
    x = 574,776.63

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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.