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Finding the Fourth Proportional to 662,803.95, 914,773.32 and 390,901.74

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Solution

The fourth proportional to 662,803.95, 914,773.32 and 390,901.74 is: 539,505.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,803.95 : 914,773.32 = 390,901.74 : x
  2. Step 2: Convert to fraction form
    662,803.95/914,773.32 = 390,901.74/x
  3. Step 3: Cross multiply
    662,803.95x = 914,773.32 × 390,901.74
  4. Step 4: Simplify right side
    662,803.95x = 357,586,477,919.71
  5. Step 5: Solve for x
    x = 357,586,477,919.71/662,803.95
  6. Step 6: Final answer
    x = 539,505.65

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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.