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Finding the Fourth Proportional to 642,295.40, 963,443.10 and 404,868.20

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Solution

The fourth proportional to 642,295.40, 963,443.10 and 404,868.20 is: 607,302.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,295.40 : 963,443.10 = 404,868.20 : x
  2. Step 2: Convert to fraction form
    642,295.40/963,443.10 = 404,868.20/x
  3. Step 3: Cross multiply
    642,295.40x = 963,443.10 × 404,868.20
  4. Step 4: Simplify right side
    642,295.40x = 390,067,473,699.42
  5. Step 5: Solve for x
    x = 390,067,473,699.42/642,295.40
  6. Step 6: Final answer
    x = 607,302.30

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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.