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Finding the Fourth Proportional to 630,695.79, 870,347.25 and 344,215.80

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Solution

The fourth proportional to 630,695.79, 870,347.25 and 344,215.80 is: 475,010.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,695.79 : 870,347.25 = 344,215.80 : x
  2. Step 2: Convert to fraction form
    630,695.79/870,347.25 = 344,215.80/x
  3. Step 3: Cross multiply
    630,695.79x = 870,347.25 × 344,215.80
  4. Step 4: Simplify right side
    630,695.79x = 299,587,274,936.55
  5. Step 5: Solve for x
    x = 299,587,274,936.55/630,695.79
  6. Step 6: Final answer
    x = 475,010.74

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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.