Home / 662,890.81-914,746.26-390,896.36

Finding the Fourth Proportional to 662,890.81, 914,746.26 and 390,896.36

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Solution

The fourth proportional to 662,890.81, 914,746.26 and 390,896.36 is: 539,411.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,890.81 : 914,746.26 = 390,896.36 : x
  2. Step 2: Convert to fraction form
    662,890.81/914,746.26 = 390,896.36/x
  3. Step 3: Cross multiply
    662,890.81x = 914,746.26 × 390,896.36
  4. Step 4: Simplify right side
    662,890.81x = 357,570,983,357.61
  5. Step 5: Solve for x
    x = 357,570,983,357.61/662,890.81
  6. Step 6: Final answer
    x = 539,411.59

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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.