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Finding the Fourth Proportional to 369,136.80, 553,359.60 and 289,130.40

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Solution

The fourth proportional to 369,136.80, 553,359.60 and 289,130.40 is: 433,424.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    369,136.80 : 553,359.60 = 289,130.40 : x
  2. Step 2: Convert to fraction form
    369,136.80/553,359.60 = 289,130.40/x
  3. Step 3: Cross multiply
    369,136.80x = 553,359.60 × 289,130.40
  4. Step 4: Simplify right side
    369,136.80x = 159,993,082,491.84
  5. Step 5: Solve for x
    x = 159,993,082,491.84/369,136.80
  6. Step 6: Final answer
    x = 433,424.91

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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.