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Finding the Fourth Proportional to 662,720.61, 914,510.94 and 390,775.35

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Solution

The fourth proportional to 662,720.61, 914,510.94 and 390,775.35 is: 539,244.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,720.61 : 914,510.94 = 390,775.35 : x
  2. Step 2: Convert to fraction form
    662,720.61/914,510.94 = 390,775.35/x
  3. Step 3: Cross multiply
    662,720.61x = 914,510.94 × 390,775.35
  4. Step 4: Simplify right side
    662,720.61x = 357,368,332,657.33
  5. Step 5: Solve for x
    x = 357,368,332,657.33/662,720.61
  6. Step 6: Final answer
    x = 539,244.33

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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.