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Finding the Fourth Proportional to 630,543.40, 870,170.88 and 344,079.20

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Solution

The fourth proportional to 630,543.40, 870,170.88 and 344,079.20 is: 474,840.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,543.40 : 870,170.88 = 344,079.20 : x
  2. Step 2: Convert to fraction form
    630,543.40/870,170.88 = 344,079.20/x
  3. Step 3: Cross multiply
    630,543.40x = 870,170.88 × 344,079.20
  4. Step 4: Simplify right side
    630,543.40x = 299,407,703,719.42
  5. Step 5: Solve for x
    x = 299,407,703,719.42/630,543.40
  6. Step 6: Final answer
    x = 474,840.76

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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.