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Finding the Fourth Proportional to 631,058.94, 870,929.90 and 389,335.30

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Solution

The fourth proportional to 631,058.94, 870,929.90 and 389,335.30 is: 537,325.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,058.94 : 870,929.90 = 389,335.30 : x
  2. Step 2: Convert to fraction form
    631,058.94/870,929.90 = 389,335.30/x
  3. Step 3: Cross multiply
    631,058.94x = 870,929.90 × 389,335.30
  4. Step 4: Simplify right side
    631,058.94x = 339,083,751,231.48
  5. Step 5: Solve for x
    x = 339,083,751,231.48/631,058.94
  6. Step 6: Final answer
    x = 537,325.01

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Double scale
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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.