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Finding the Fourth Proportional to 620,403.20, 931,479.60 and 384,207.20

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Solution

The fourth proportional to 620,403.20, 931,479.60 and 384,207.20 is: 576,852.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,403.20 : 931,479.60 = 384,207.20 : x
  2. Step 2: Convert to fraction form
    620,403.20/931,479.60 = 384,207.20/x
  3. Step 3: Cross multiply
    620,403.20x = 931,479.60 × 384,207.20
  4. Step 4: Simplify right side
    620,403.20x = 357,881,168,973.12
  5. Step 5: Solve for x
    x = 357,881,168,973.12/620,403.20
  6. Step 6: Final answer
    x = 576,852.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.