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Finding the Fourth Proportional to 662,965.16, 914,848.88 and 390,970.71

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Solution

The fourth proportional to 662,965.16, 914,848.88 and 390,970.71 is: 539,514.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,965.16 : 914,848.88 = 390,970.71 : x
  2. Step 2: Convert to fraction form
    662,965.16/914,848.88 = 390,970.71/x
  3. Step 3: Cross multiply
    662,965.16x = 914,848.88 × 390,970.71
  4. Step 4: Simplify right side
    662,965.16x = 357,679,114,201.45
  5. Step 5: Solve for x
    x = 357,679,114,201.45/662,965.16
  6. Step 6: Final answer
    x = 539,514.20

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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.