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Finding the Fourth Proportional to 612,077.40, 918,116.10 and 328,642.20

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Solution

The fourth proportional to 612,077.40, 918,116.10 and 328,642.20 is: 492,963.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,077.40 : 918,116.10 = 328,642.20 : x
  2. Step 2: Convert to fraction form
    612,077.40/918,116.10 = 328,642.20/x
  3. Step 3: Cross multiply
    612,077.40x = 918,116.10 × 328,642.20
  4. Step 4: Simplify right side
    612,077.40x = 301,731,694,959.42
  5. Step 5: Solve for x
    x = 301,731,694,959.42/612,077.40
  6. Step 6: Final answer
    x = 492,963.30

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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.