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Finding the Fourth Proportional to 628,384.36, 866,888.58 and 424,369

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Solution

The fourth proportional to 628,384.36, 866,888.58 and 424,369 is: 585,438.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,384.36 : 866,888.58 = 424,369 : x
  2. Step 2: Convert to fraction form
    628,384.36/866,888.58 = 424,369/x
  3. Step 3: Cross multiply
    628,384.36x = 866,888.58 × 424,369
  4. Step 4: Simplify right side
    628,384.36x = 367,880,639,806.02
  5. Step 5: Solve for x
    x = 367,880,639,806.02/628,384.36
  6. Step 6: Final answer
    x = 585,438.89

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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.