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Finding the Fourth Proportional to 630,381.21, 869,908.80 and 343,901.22

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Solution

The fourth proportional to 630,381.21, 869,908.80 and 343,901.22 is: 474,574.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,381.21 : 869,908.80 = 343,901.22 : x
  2. Step 2: Convert to fraction form
    630,381.21/869,908.80 = 343,901.22/x
  3. Step 3: Cross multiply
    630,381.21x = 869,908.80 × 343,901.22
  4. Step 4: Simplify right side
    630,381.21x = 299,162,697,608.74
  5. Step 5: Solve for x
    x = 299,162,697,608.74/630,381.21
  6. Step 6: Final answer
    x = 474,574.26

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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.