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Finding the Fourth Proportional to 405,015.40, 606,210.90 and 357,776.20

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Solution

The fourth proportional to 405,015.40, 606,210.90 and 357,776.20 is: 535,505.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,015.40 : 606,210.90 = 357,776.20 : x
  2. Step 2: Convert to fraction form
    405,015.40/606,210.90 = 357,776.20/x
  3. Step 3: Cross multiply
    405,015.40x = 606,210.90 × 357,776.20
  4. Step 4: Simplify right side
    405,015.40x = 216,887,832,200.58
  5. Step 5: Solve for x
    x = 216,887,832,200.58/405,015.40
  6. Step 6: Final answer
    x = 535,505.15

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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.