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Finding the Fourth Proportional to 401,817.40, 602,726.10 and 260,099.80

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Solution

The fourth proportional to 401,817.40, 602,726.10 and 260,099.80 is: 390,149.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,817.40 : 602,726.10 = 260,099.80 : x
  2. Step 2: Convert to fraction form
    401,817.40/602,726.10 = 260,099.80/x
  3. Step 3: Cross multiply
    401,817.40x = 602,726.10 × 260,099.80
  4. Step 4: Simplify right side
    401,817.40x = 156,768,938,064.78
  5. Step 5: Solve for x
    x = 156,768,938,064.78/401,817.40
  6. Step 6: Final answer
    x = 390,149.70

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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.