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Finding the Fourth Proportional to 604,555.40, 908,801.40 and 428,283.20

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Solution

The fourth proportional to 604,555.40, 908,801.40 and 428,283.20 is: 643,819.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    604,555.40 : 908,801.40 = 428,283.20 : x
  2. Step 2: Convert to fraction form
    604,555.40/908,801.40 = 428,283.20/x
  3. Step 3: Cross multiply
    604,555.40x = 908,801.40 × 428,283.20
  4. Step 4: Simplify right side
    604,555.40x = 389,224,371,756.48
  5. Step 5: Solve for x
    x = 389,224,371,756.48/604,555.40
  6. Step 6: Final answer
    x = 643,819.20

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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.