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Finding the Fourth Proportional to 900,398.77, 1,242,482.93 and 492,479.53

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Solution

The fourth proportional to 900,398.77, 1,242,482.93 and 492,479.53 is: 679,584.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    900,398.77 : 1,242,482.93 = 492,479.53 : x
  2. Step 2: Convert to fraction form
    900,398.77/1,242,482.93 = 492,479.53/x
  3. Step 3: Cross multiply
    900,398.77x = 1,242,482.93 × 492,479.53
  4. Step 4: Simplify right side
    900,398.77x = 611,897,407,524.41
  5. Step 5: Solve for x
    x = 611,897,407,524.41/900,398.77
  6. Step 6: Final answer
    x = 679,584.90

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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.