Home / 712,429.95-983,119.41-390,141.80

Finding the Fourth Proportional to 712,429.95, 983,119.41 and 390,141.80

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Solution

The fourth proportional to 712,429.95, 983,119.41 and 390,141.80 is: 538,377.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,429.95 : 983,119.41 = 390,141.80 : x
  2. Step 2: Convert to fraction form
    712,429.95/983,119.41 = 390,141.80/x
  3. Step 3: Cross multiply
    712,429.95x = 983,119.41 × 390,141.80
  4. Step 4: Simplify right side
    712,429.95x = 383,555,971,316.74
  5. Step 5: Solve for x
    x = 383,555,971,316.74/712,429.95
  6. Step 6: Final answer
    x = 538,377.10

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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.