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Finding the Fourth Proportional to 662,542.76, 914,428.14 and 390,594.44

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Solution

The fourth proportional to 662,542.76, 914,428.14 and 390,594.44 is: 539,090.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,542.76 : 914,428.14 = 390,594.44 : x
  2. Step 2: Convert to fraction form
    662,542.76/914,428.14 = 390,594.44/x
  3. Step 3: Cross multiply
    662,542.76x = 914,428.14 × 390,594.44
  4. Step 4: Simplify right side
    662,542.76x = 357,170,547,263.54
  5. Step 5: Solve for x
    x = 357,170,547,263.54/662,542.76
  6. Step 6: Final answer
    x = 539,090.56

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Double scale
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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.