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Finding the Fourth Proportional to 478,412.80, 717,619.20 and 366,438.40

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Solution

The fourth proportional to 478,412.80, 717,619.20 and 366,438.40 is: 549,657.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,412.80 : 717,619.20 = 366,438.40 : x
  2. Step 2: Convert to fraction form
    478,412.80/717,619.20 = 366,438.40/x
  3. Step 3: Cross multiply
    478,412.80x = 717,619.20 × 366,438.40
  4. Step 4: Simplify right side
    478,412.80x = 262,963,231,457.28
  5. Step 5: Solve for x
    x = 262,963,231,457.28/478,412.80
  6. Step 6: Final answer
    x = 549,657.60

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Similar ratio
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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.