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Finding the Fourth Proportional to 630,905.04, 870,648.12 and 404,550

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Solution

The fourth proportional to 630,905.04, 870,648.12 and 404,550 is: 558,278.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,905.04 : 870,648.12 = 404,550 : x
  2. Step 2: Convert to fraction form
    630,905.04/870,648.12 = 404,550/x
  3. Step 3: Cross multiply
    630,905.04x = 870,648.12 × 404,550
  4. Step 4: Simplify right side
    630,905.04x = 352,220,696,946
  5. Step 5: Solve for x
    x = 352,220,696,946/630,905.04
  6. Step 6: Final answer
    x = 558,278.46

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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.