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Finding the Fourth Proportional to 865,353.80, 1,298,030.70 and 304,315.40

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Solution

The fourth proportional to 865,353.80, 1,298,030.70 and 304,315.40 is: 456,473.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,353.80 : 1,298,030.70 = 304,315.40 : x
  2. Step 2: Convert to fraction form
    865,353.80/1,298,030.70 = 304,315.40/x
  3. Step 3: Cross multiply
    865,353.80x = 1,298,030.70 × 304,315.40
  4. Step 4: Simplify right side
    865,353.80x = 395,010,731,682.78
  5. Step 5: Solve for x
    x = 395,010,731,682.78/865,353.80
  6. Step 6: Final answer
    x = 456,473.10

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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.