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Finding the Fourth Proportional to 659,353.40, 989,030.10 and 431,030.60

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Solution

The fourth proportional to 659,353.40, 989,030.10 and 431,030.60 is: 646,545.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,353.40 : 989,030.10 = 431,030.60 : x
  2. Step 2: Convert to fraction form
    659,353.40/989,030.10 = 431,030.60/x
  3. Step 3: Cross multiply
    659,353.40x = 989,030.10 × 431,030.60
  4. Step 4: Simplify right side
    659,353.40x = 426,302,237,421.06
  5. Step 5: Solve for x
    x = 426,302,237,421.06/659,353.40
  6. Step 6: Final answer
    x = 646,545.90

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Similar ratio
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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.