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Finding the Fourth Proportional to 521,944.32, 720,630 and 400,869.21

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Solution

The fourth proportional to 521,944.32, 720,630 and 400,869.21 is: 553,465.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,944.32 : 720,630 = 400,869.21 : x
  2. Step 2: Convert to fraction form
    521,944.32/720,630 = 400,869.21/x
  3. Step 3: Cross multiply
    521,944.32x = 720,630 × 400,869.21
  4. Step 4: Simplify right side
    521,944.32x = 288,878,378,802.30
  5. Step 5: Solve for x
    x = 288,878,378,802.30/521,944.32
  6. Step 6: Final answer
    x = 553,465.89

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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.