Home / 438,526.80-658,049.40-319,899.60

Finding the Fourth Proportional to 438,526.80, 658,049.40 and 319,899.60

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Solution

The fourth proportional to 438,526.80, 658,049.40 and 319,899.60 is: 480,038.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,526.80 : 658,049.40 = 319,899.60 : x
  2. Step 2: Convert to fraction form
    438,526.80/658,049.40 = 319,899.60/x
  3. Step 3: Cross multiply
    438,526.80x = 658,049.40 × 319,899.60
  4. Step 4: Simplify right side
    438,526.80x = 210,509,739,840.24
  5. Step 5: Solve for x
    x = 210,509,739,840.24/438,526.80
  6. Step 6: Final answer
    x = 480,038.48

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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.