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Finding the Fourth Proportional to 338,431.20, 507,646.80 and 101,810.40

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Solution

The fourth proportional to 338,431.20, 507,646.80 and 101,810.40 is: 152,715.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,431.20 : 507,646.80 = 101,810.40 : x
  2. Step 2: Convert to fraction form
    338,431.20/507,646.80 = 101,810.40/x
  3. Step 3: Cross multiply
    338,431.20x = 507,646.80 × 101,810.40
  4. Step 4: Simplify right side
    338,431.20x = 51,683,723,766.72
  5. Step 5: Solve for x
    x = 51,683,723,766.72/338,431.20
  6. Step 6: Final answer
    x = 152,715.60

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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.