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Finding the Fourth Proportional to 607,430.80, 911,405.40 and 291,725.20

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Solution

The fourth proportional to 607,430.80, 911,405.40 and 291,725.20 is: 437,712.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    607,430.80 : 911,405.40 = 291,725.20 : x
  2. Step 2: Convert to fraction form
    607,430.80/911,405.40 = 291,725.20/x
  3. Step 3: Cross multiply
    607,430.80x = 911,405.40 × 291,725.20
  4. Step 4: Simplify right side
    607,430.80x = 265,879,922,596.08
  5. Step 5: Solve for x
    x = 265,879,922,596.08/607,430.80
  6. Step 6: Final answer
    x = 437,712.28

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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.