Home / 918,136.70-1,377,205.05-420,472.70

Finding the Fourth Proportional to 918,136.70, 1,377,205.05 and 420,472.70

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Solution

The fourth proportional to 918,136.70, 1,377,205.05 and 420,472.70 is: 630,709.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,136.70 : 1,377,205.05 = 420,472.70 : x
  2. Step 2: Convert to fraction form
    918,136.70/1,377,205.05 = 420,472.70/x
  3. Step 3: Cross multiply
    918,136.70x = 1,377,205.05 × 420,472.70
  4. Step 4: Simplify right side
    918,136.70x = 579,077,125,827.14
  5. Step 5: Solve for x
    x = 579,077,125,827.14/918,136.70
  6. Step 6: Final answer
    x = 630,709.05

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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.