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Finding the Fourth Proportional to 380,026.60, 570,039.90 and 355,143.40

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Solution

The fourth proportional to 380,026.60, 570,039.90 and 355,143.40 is: 532,715.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,026.60 : 570,039.90 = 355,143.40 : x
  2. Step 2: Convert to fraction form
    380,026.60/570,039.90 = 355,143.40/x
  3. Step 3: Cross multiply
    380,026.60x = 570,039.90 × 355,143.40
  4. Step 4: Simplify right side
    380,026.60x = 202,445,908,221.66
  5. Step 5: Solve for x
    x = 202,445,908,221.66/380,026.60
  6. Step 6: Final answer
    x = 532,715.10

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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.