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Finding the Fourth Proportional to 662,458.76, 914,312.32 and 390,510.44

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Solution

The fourth proportional to 662,458.76, 914,312.32 and 390,510.44 is: 538,974.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,458.76 : 914,312.32 = 390,510.44 : x
  2. Step 2: Convert to fraction form
    662,458.76/914,312.32 = 390,510.44/x
  3. Step 3: Cross multiply
    662,458.76x = 914,312.32 × 390,510.44
  4. Step 4: Simplify right side
    662,458.76x = 357,048,506,380.62
  5. Step 5: Solve for x
    x = 357,048,506,380.62/662,458.76
  6. Step 6: Final answer
    x = 538,974.69

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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.