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Finding the Fourth Proportional to 645,646.50, 890,950.05 and 359,156.34

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Solution

The fourth proportional to 645,646.50, 890,950.05 and 359,156.34 is: 495,612.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,646.50 : 890,950.05 = 359,156.34 : x
  2. Step 2: Convert to fraction form
    645,646.50/890,950.05 = 359,156.34/x
  3. Step 3: Cross multiply
    645,646.50x = 890,950.05 × 359,156.34
  4. Step 4: Simplify right side
    645,646.50x = 319,990,359,080.82
  5. Step 5: Solve for x
    x = 319,990,359,080.82/645,646.50
  6. Step 6: Final answer
    x = 495,612.32

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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.