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Finding the Fourth Proportional to 370.58, 510.91 and 307.40

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Solution

The fourth proportional to 370.58, 510.91 and 307.40 is: 423.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.58 : 510.91 = 307.40 : x
  2. Step 2: Convert to fraction form
    370.58/510.91 = 307.40/x
  3. Step 3: Cross multiply
    370.58x = 510.91 × 307.40
  4. Step 4: Simplify right side
    370.58x = 157,050.41
  5. Step 5: Solve for x
    x = 157,050.41/370.58
  6. Step 6: Final answer
    x = 423.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.