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Finding the Fourth Proportional to 421,312.32, 581,420.16 and 251,514.72

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Solution

The fourth proportional to 421,312.32, 581,420.16 and 251,514.72 is: 347,095.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,312.32 : 581,420.16 = 251,514.72 : x
  2. Step 2: Convert to fraction form
    421,312.32/581,420.16 = 251,514.72/x
  3. Step 3: Cross multiply
    421,312.32x = 581,420.16 × 251,514.72
  4. Step 4: Simplify right side
    421,312.32x = 146,235,728,744.76
  5. Step 5: Solve for x
    x = 146,235,728,744.76/421,312.32
  6. Step 6: Final answer
    x = 347,095.78

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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.