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Finding the Fourth Proportional to 478,528.26, 660,415.54 and 357,459.36

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Solution

The fourth proportional to 478,528.26, 660,415.54 and 357,459.36 is: 493,328.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,528.26 : 660,415.54 = 357,459.36 : x
  2. Step 2: Convert to fraction form
    478,528.26/660,415.54 = 357,459.36/x
  3. Step 3: Cross multiply
    478,528.26x = 660,415.54 × 357,459.36
  4. Step 4: Simplify right side
    478,528.26x = 236,071,716,262.45
  5. Step 5: Solve for x
    x = 236,071,716,262.45/478,528.26
  6. Step 6: Final answer
    x = 493,328.68

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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.