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Finding the Fourth Proportional to 478,528.11, 660,415.32 and 357,459.20

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Solution

The fourth proportional to 478,528.11, 660,415.32 and 357,459.20 is: 493,328.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,528.11 : 660,415.32 = 357,459.20 : x
  2. Step 2: Convert to fraction form
    478,528.11/660,415.32 = 357,459.20/x
  3. Step 3: Cross multiply
    478,528.11x = 660,415.32 × 357,459.20
  4. Step 4: Simplify right side
    478,528.11x = 236,071,530,167.65
  5. Step 5: Solve for x
    x = 236,071,530,167.65/478,528.11
  6. Step 6: Final answer
    x = 493,328.45

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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.