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Finding the Fourth Proportional to 621,000.53, 931,500.79 and 355,280.03

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Solution

The fourth proportional to 621,000.53, 931,500.79 and 355,280.03 is: 532,920.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,000.53 : 931,500.79 = 355,280.03 : x
  2. Step 2: Convert to fraction form
    621,000.53/931,500.79 = 355,280.03/x
  3. Step 3: Cross multiply
    621,000.53x = 931,500.79 × 355,280.03
  4. Step 4: Simplify right side
    621,000.53x = 330,943,623,070.52
  5. Step 5: Solve for x
    x = 330,943,623,070.52/621,000.53
  6. Step 6: Final answer
    x = 532,920.04

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Similar ratio
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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.