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Finding the Fourth Proportional to 693,411.24, 956,622.55 and 421,435.32

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Solution

The fourth proportional to 693,411.24, 956,622.55 and 421,435.32 is: 581,407.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,411.24 : 956,622.55 = 421,435.32 : x
  2. Step 2: Convert to fraction form
    693,411.24/956,622.55 = 421,435.32/x
  3. Step 3: Cross multiply
    693,411.24x = 956,622.55 × 421,435.32
  4. Step 4: Simplify right side
    693,411.24x = 403,154,530,478.47
  5. Step 5: Solve for x
    x = 403,154,530,478.47/693,411.24
  6. Step 6: Final answer
    x = 581,407.55

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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.