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Finding the Fourth Proportional to 946.57, 1,420.19 and 507.35

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Solution

The fourth proportional to 946.57, 1,420.19 and 507.35 is: 761.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    946.57 : 1,420.19 = 507.35 : x
  2. Step 2: Convert to fraction form
    946.57/1,420.19 = 507.35/x
  3. Step 3: Cross multiply
    946.57x = 1,420.19 × 507.35
  4. Step 4: Simplify right side
    946.57x = 720,533.40
  5. Step 5: Solve for x
    x = 720,533.40/946.57
  6. Step 6: Final answer
    x = 761.20

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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.