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Finding the Fourth Proportional to 630,939.65, 870,656.18 and 344,459.12

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Solution

The fourth proportional to 630,939.65, 870,656.18 and 344,459.12 is: 475,331.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,939.65 : 870,656.18 = 344,459.12 : x
  2. Step 2: Convert to fraction form
    630,939.65/870,656.18 = 344,459.12/x
  3. Step 3: Cross multiply
    630,939.65x = 870,656.18 × 344,459.12
  4. Step 4: Simplify right side
    630,939.65x = 299,905,455,509.79
  5. Step 5: Solve for x
    x = 299,905,455,509.79/630,939.65
  6. Step 6: Final answer
    x = 475,331.45

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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.