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Finding the Fourth Proportional to 621,416.36, 931,478.16 and 421,752.98

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Solution

The fourth proportional to 621,416.36, 931,478.16 and 421,752.98 is: 632,190.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,416.36 : 931,478.16 = 421,752.98 : x
  2. Step 2: Convert to fraction form
    621,416.36/931,478.16 = 421,752.98/x
  3. Step 3: Cross multiply
    621,416.36x = 931,478.16 × 421,752.98
  4. Step 4: Simplify right side
    621,416.36x = 392,853,689,784.92
  5. Step 5: Solve for x
    x = 392,853,689,784.92/621,416.36
  6. Step 6: Final answer
    x = 632,190.77

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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.