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Finding the Fourth Proportional to 478,307.70, 660,111.21 and 357,238.80

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Solution

The fourth proportional to 478,307.70, 660,111.21 and 357,238.80 is: 493,024.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,307.70 : 660,111.21 = 357,238.80 : x
  2. Step 2: Convert to fraction form
    478,307.70/660,111.21 = 357,238.80/x
  3. Step 3: Cross multiply
    478,307.70x = 660,111.21 × 357,238.80
  4. Step 4: Simplify right side
    478,307.70x = 235,817,336,526.95
  5. Step 5: Solve for x
    x = 235,817,336,526.95/478,307.70
  6. Step 6: Final answer
    x = 493,024.34

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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.