Home / 712,419.10-983,108.84-390,123.65

Finding the Fourth Proportional to 712,419.10, 983,108.84 and 390,123.65

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Solution

The fourth proportional to 712,419.10, 983,108.84 and 390,123.65 is: 538,354.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,419.10 : 983,108.84 = 390,123.65 : x
  2. Step 2: Convert to fraction form
    712,419.10/983,108.84 = 390,123.65/x
  3. Step 3: Cross multiply
    712,419.10x = 983,108.84 × 390,123.65
  4. Step 4: Simplify right side
    712,419.10x = 383,534,009,515.22
  5. Step 5: Solve for x
    x = 383,534,009,515.22/712,419.10
  6. Step 6: Final answer
    x = 538,354.48

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Similar ratio
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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.