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Finding the Fourth Proportional to 630,470.40, 945,705.60 and 578,860.80

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Solution

The fourth proportional to 630,470.40, 945,705.60 and 578,860.80 is: 868,291.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,470.40 : 945,705.60 = 578,860.80 : x
  2. Step 2: Convert to fraction form
    630,470.40/945,705.60 = 578,860.80/x
  3. Step 3: Cross multiply
    630,470.40x = 945,705.60 × 578,860.80
  4. Step 4: Simplify right side
    630,470.40x = 547,431,900,180.48
  5. Step 5: Solve for x
    x = 547,431,900,180.48/630,470.40
  6. Step 6: Final answer
    x = 868,291.20

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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.