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Finding the Fourth Proportional to 380,045.70, 570,068.55 and 99,591.30

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Solution

The fourth proportional to 380,045.70, 570,068.55 and 99,591.30 is: 149,386.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,045.70 : 570,068.55 = 99,591.30 : x
  2. Step 2: Convert to fraction form
    380,045.70/570,068.55 = 99,591.30/x
  3. Step 3: Cross multiply
    380,045.70x = 570,068.55 × 99,591.30
  4. Step 4: Simplify right side
    380,045.70x = 56,773,867,983.62
  5. Step 5: Solve for x
    x = 56,773,867,983.62/380,045.70
  6. Step 6: Final answer
    x = 149,386.95

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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.