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Finding the Fourth Proportional to 559,947.80, 839,921.70 and 307,130.60

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Solution

The fourth proportional to 559,947.80, 839,921.70 and 307,130.60 is: 460,695.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,947.80 : 839,921.70 = 307,130.60 : x
  2. Step 2: Convert to fraction form
    559,947.80/839,921.70 = 307,130.60/x
  3. Step 3: Cross multiply
    559,947.80x = 839,921.70 × 307,130.60
  4. Step 4: Simplify right side
    559,947.80x = 257,965,655,674.02
  5. Step 5: Solve for x
    x = 257,965,655,674.02/559,947.80
  6. Step 6: Final answer
    x = 460,695.90

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Double scale
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Similar ratio
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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.