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Finding the Fourth Proportional to 877,674.90, 1,211,207.40 and 495,630.30

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Solution

The fourth proportional to 877,674.90, 1,211,207.40 and 495,630.30 is: 683,978.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    877,674.90 : 1,211,207.40 = 495,630.30 : x
  2. Step 2: Convert to fraction form
    877,674.90/1,211,207.40 = 495,630.30/x
  3. Step 3: Cross multiply
    877,674.90x = 1,211,207.40 × 495,630.30
  4. Step 4: Simplify right side
    877,674.90x = 600,311,087,024.22
  5. Step 5: Solve for x
    x = 600,311,087,024.22/877,674.90
  6. Step 6: Final answer
    x = 683,978.87

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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.