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Finding the Fourth Proportional to 611,570.10, 917,355.15 and 485,598.90

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Solution

The fourth proportional to 611,570.10, 917,355.15 and 485,598.90 is: 728,398.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,570.10 : 917,355.15 = 485,598.90 : x
  2. Step 2: Convert to fraction form
    611,570.10/917,355.15 = 485,598.90/x
  3. Step 3: Cross multiply
    611,570.10x = 917,355.15 × 485,598.90
  4. Step 4: Simplify right side
    611,570.10x = 445,466,651,749.34
  5. Step 5: Solve for x
    x = 445,466,651,749.34/611,570.10
  6. Step 6: Final answer
    x = 728,398.35

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.