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Finding the Fourth Proportional to 315,645.40, 473,468.10 and 209,357.20

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Solution

The fourth proportional to 315,645.40, 473,468.10 and 209,357.20 is: 314,035.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,645.40 : 473,468.10 = 209,357.20 : x
  2. Step 2: Convert to fraction form
    315,645.40/473,468.10 = 209,357.20/x
  3. Step 3: Cross multiply
    315,645.40x = 473,468.10 × 209,357.20
  4. Step 4: Simplify right side
    315,645.40x = 99,123,955,705.32
  5. Step 5: Solve for x
    x = 99,123,955,705.32/315,645.40
  6. Step 6: Final answer
    x = 314,035.80

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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.