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Finding the Fourth Proportional to 570,150.90, 786,809.70 and 315,511.20

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Solution

The fourth proportional to 570,150.90, 786,809.70 and 315,511.20 is: 435,406.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,150.90 : 786,809.70 = 315,511.20 : x
  2. Step 2: Convert to fraction form
    570,150.90/786,809.70 = 315,511.20/x
  3. Step 3: Cross multiply
    570,150.90x = 786,809.70 × 315,511.20
  4. Step 4: Simplify right side
    570,150.90x = 248,247,272,618.64
  5. Step 5: Solve for x
    x = 248,247,272,618.64/570,150.90
  6. Step 6: Final answer
    x = 435,406.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.