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Finding the Fourth Proportional to 403,243.40, 604,865.10 and 309,931.40

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Solution

The fourth proportional to 403,243.40, 604,865.10 and 309,931.40 is: 464,897.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,243.40 : 604,865.10 = 309,931.40 : x
  2. Step 2: Convert to fraction form
    403,243.40/604,865.10 = 309,931.40/x
  3. Step 3: Cross multiply
    403,243.40x = 604,865.10 × 309,931.40
  4. Step 4: Simplify right side
    403,243.40x = 187,466,687,254.14
  5. Step 5: Solve for x
    x = 187,466,687,254.14/403,243.40
  6. Step 6: Final answer
    x = 464,897.10

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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.