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Finding the Fourth Proportional to 638,701.76, 881,396.16 and 352,248.32

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Solution

The fourth proportional to 638,701.76, 881,396.16 and 352,248.32 is: 486,095.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,701.76 : 881,396.16 = 352,248.32 : x
  2. Step 2: Convert to fraction form
    638,701.76/881,396.16 = 352,248.32/x
  3. Step 3: Cross multiply
    638,701.76x = 881,396.16 × 352,248.32
  4. Step 4: Simplify right side
    638,701.76x = 310,470,316,614.45
  5. Step 5: Solve for x
    x = 310,470,316,614.45/638,701.76
  6. Step 6: Final answer
    x = 486,095.92

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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.