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Finding the Fourth Proportional to 604,543.90, 908,784.15 and 428,271.70

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Solution

The fourth proportional to 604,543.90, 908,784.15 and 428,271.70 is: 643,801.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    604,543.90 : 908,784.15 = 428,271.70 : x
  2. Step 2: Convert to fraction form
    604,543.90/908,784.15 = 428,271.70/x
  3. Step 3: Cross multiply
    604,543.90x = 908,784.15 × 428,271.70
  4. Step 4: Simplify right side
    604,543.90x = 389,206,532,853.56
  5. Step 5: Solve for x
    x = 389,206,532,853.56/604,543.90
  6. Step 6: Final answer
    x = 643,801.94

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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.