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Finding the Fourth Proportional to 880,763.34, 1,215,459.63 and 478,355.34

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Solution

The fourth proportional to 880,763.34, 1,215,459.63 and 478,355.34 is: 660,133.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    880,763.34 : 1,215,459.63 = 478,355.34 : x
  2. Step 2: Convert to fraction form
    880,763.34/1,215,459.63 = 478,355.34/x
  3. Step 3: Cross multiply
    880,763.34x = 1,215,459.63 × 478,355.34
  4. Step 4: Simplify right side
    880,763.34x = 581,421,604,564.92
  5. Step 5: Solve for x
    x = 581,421,604,564.92/880,763.34
  6. Step 6: Final answer
    x = 660,133.75

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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.