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Finding the Fourth Proportional to 630,381.19, 869,908.80 and 343,901.20

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Solution

The fourth proportional to 630,381.19, 869,908.80 and 343,901.20 is: 474,574.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,381.19 : 869,908.80 = 343,901.20 : x
  2. Step 2: Convert to fraction form
    630,381.19/869,908.80 = 343,901.20/x
  3. Step 3: Cross multiply
    630,381.19x = 869,908.80 × 343,901.20
  4. Step 4: Simplify right side
    630,381.19x = 299,162,680,210.56
  5. Step 5: Solve for x
    x = 299,162,680,210.56/630,381.19
  6. Step 6: Final answer
    x = 474,574.25

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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.