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Finding the Fourth Proportional to 386,416.60, 578,847.30 and 260,445.40

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Solution

The fourth proportional to 386,416.60, 578,847.30 and 260,445.40 is: 390,144.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,416.60 : 578,847.30 = 260,445.40 : x
  2. Step 2: Convert to fraction form
    386,416.60/578,847.30 = 260,445.40/x
  3. Step 3: Cross multiply
    386,416.60x = 578,847.30 × 260,445.40
  4. Step 4: Simplify right side
    386,416.60x = 150,758,116,587.42
  5. Step 5: Solve for x
    x = 150,758,116,587.42/386,416.60
  6. Step 6: Final answer
    x = 390,144.00

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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.