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Finding the Fourth Proportional to 662,802.42, 914,771.21 and 390,900.20

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Solution

The fourth proportional to 662,802.42, 914,771.21 and 390,900.20 is: 539,503.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,802.42 : 914,771.21 = 390,900.20 : x
  2. Step 2: Convert to fraction form
    662,802.42/914,771.21 = 390,900.20/x
  3. Step 3: Cross multiply
    662,802.42x = 914,771.21 × 390,900.20
  4. Step 4: Simplify right side
    662,802.42x = 357,584,248,943.24
  5. Step 5: Solve for x
    x = 357,584,248,943.24/662,802.42
  6. Step 6: Final answer
    x = 539,503.54

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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.