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Finding the Fourth Proportional to 559,639.87, 772,280.49 and 304,985.59

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Solution

The fourth proportional to 559,639.87, 772,280.49 and 304,985.59 is: 420,867.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,639.87 : 772,280.49 = 304,985.59 : x
  2. Step 2: Convert to fraction form
    559,639.87/772,280.49 = 304,985.59/x
  3. Step 3: Cross multiply
    559,639.87x = 772,280.49 × 304,985.59
  4. Step 4: Simplify right side
    559,639.87x = 235,534,420,888.14
  5. Step 5: Solve for x
    x = 235,534,420,888.14/559,639.87
  6. Step 6: Final answer
    x = 420,867.84

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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.