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Finding the Fourth Proportional to 208,140.30, 312,210.45 and 208,140.30

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Solution

The fourth proportional to 208,140.30, 312,210.45 and 208,140.30 is: 312,210.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,140.30 : 312,210.45 = 208,140.30 : x
  2. Step 2: Convert to fraction form
    208,140.30/312,210.45 = 208,140.30/x
  3. Step 3: Cross multiply
    208,140.30x = 312,210.45 × 208,140.30
  4. Step 4: Simplify right side
    208,140.30x = 64,983,576,726.14
  5. Step 5: Solve for x
    x = 64,983,576,726.14/208,140.30
  6. Step 6: Final answer
    x = 312,210.45

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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.