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Finding the Fourth Proportional to 570,480.49, 856,151.12 and 390,134.98

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Solution

The fourth proportional to 570,480.49, 856,151.12 and 390,134.98 is: 585,496.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,480.49 : 856,151.12 = 390,134.98 : x
  2. Step 2: Convert to fraction form
    570,480.49/856,151.12 = 390,134.98/x
  3. Step 3: Cross multiply
    570,480.49x = 856,151.12 × 390,134.98
  4. Step 4: Simplify right side
    570,480.49x = 334,014,500,078.18
  5. Step 5: Solve for x
    x = 334,014,500,078.18/570,480.49
  6. Step 6: Final answer
    x = 585,496.80

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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.